This page has only limited features, please log in for full access.

Dr. Md Noor-A-Rahim
School of Computer Science & IT, University College Cork, Ireland

Basic Info


Research Keywords & Expertise

0 intelligent transportation systems
0 industrial Internet of Things
0 Control over wireless networks
0 DNA data storage
0 And machine learning

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 04 September 2020 in IEEE Transactions on Intelligent Transportation Systems
Reads 0
Downloads 0

Vehicular networks, an enabling technology for Intelligent Transportation System (ITS), smart cities, and autonomous driving, can deliver numerous on-board data services, e.g., road-safety, easy navigation, traffic efficiency, comfort driving, infotainment, etc. Providing satisfactory Quality of Service (QoS) in vehicular networks, however, is a challenging task due to a number of limiting factors such as erroneous and congested wireless channels (due to high mobility or uncoordinated channel-access), increasingly fragmented and congested spectrum, hardware imperfections, and anticipated growth of vehicular communication devices. Therefore, it will be critical to allocate and utilize the available wireless network resources in an ultra-efficient manner. In this paper, we present a comprehensive survey on resource allocation schemes for the two dominant vehicular network technologies, e.g. Dedicated Short Range Communications (DSRC) and cellular based vehicular networks. We discuss the challenges and opportunities for resource allocations in modern vehicular networks and outline a number of promising future research directions.

ACS Style

Noor- A- Rahim; Zilong Liu; Haeyoung Lee; G. G. Md. Nawaz Ali; Dirk Pesch; Pei Xiao. A Survey on Resource Allocation in Vehicular Networks. IEEE Transactions on Intelligent Transportation Systems 2020, PP, 1 -21.

AMA Style

Noor- A- Rahim, Zilong Liu, Haeyoung Lee, G. G. Md. Nawaz Ali, Dirk Pesch, Pei Xiao. A Survey on Resource Allocation in Vehicular Networks. IEEE Transactions on Intelligent Transportation Systems. 2020; PP (99):1-21.

Chicago/Turabian Style

Noor- A- Rahim; Zilong Liu; Haeyoung Lee; G. G. Md. Nawaz Ali; Dirk Pesch; Pei Xiao. 2020. "A Survey on Resource Allocation in Vehicular Networks." IEEE Transactions on Intelligent Transportation Systems PP, no. 99: 1-21.

Journal article
Published: 18 August 2020 in IEEE Sensors Letters
Reads 0
Downloads 0

Narrowband ultrasonic sensors can be used for motion tracking and small scale localization. Moving sensor nodes emitting ultrasonic waves produce a Doppler shift in the received signals. Doppler correction methods in narrowband ultrasonic motion tracking systems are explained in this work. Two methods are suggested for Doppler compensation for small-scale localization using ultrasonic sensors. One of the methods requires a pilot carrier to be added to the transmitted signal and the other method exploits range-Doppler coupling for Doppler correction. In the simulation experiments, we compare the performance of the two methods with the traditional methods. We implement both the methods on hardware and compare the performance of the methods for ranging and localization in the presence of Doppler shift.

ACS Style

Karalikkadan Ashhar; Mohammad Omar Khyam; Noor- A- Rahim; Aruna Jayasuriya; Soh Cheong Boon. Doppler Correction in Moving Narrowband Ultrasonic Ranging Sensors for Small-Scale Motion Tracking. IEEE Sensors Letters 2020, 4, 1 -4.

AMA Style

Karalikkadan Ashhar, Mohammad Omar Khyam, Noor- A- Rahim, Aruna Jayasuriya, Soh Cheong Boon. Doppler Correction in Moving Narrowband Ultrasonic Ranging Sensors for Small-Scale Motion Tracking. IEEE Sensors Letters. 2020; 4 (9):1-4.

Chicago/Turabian Style

Karalikkadan Ashhar; Mohammad Omar Khyam; Noor- A- Rahim; Aruna Jayasuriya; Soh Cheong Boon. 2020. "Doppler Correction in Moving Narrowband Ultrasonic Ranging Sensors for Small-Scale Motion Tracking." IEEE Sensors Letters 4, no. 9: 1-4.

Journal article
Published: 29 July 2020 in IEEE Transactions on Vehicular Technology
Reads 0
Downloads 0

Serial concatenation of LDPC codes and continuous phase modulation (CPM) has recently gained significant attention due to its capacity-approaching performance, efficient detection as well as owing to its constant-envelope nature. Most of the previous contributions on LDPC coded CPM were devoted to the design of LDPC codes and their asymptotic performance analysis. However, there is a paucity of work on the finite-length performance estimation of LDPC coded CPM, primarily because existing performance estimation techniques cannot be readily applied to the LDPC coded CPM. To fill this gap, we conceive an analytical bit error probability estimation technique for finite-length LDPC coded CPM in the waterfall region. Numerical results are provided both for regular and irregular LDPC codes having different codeword lengths, demonstrating that the estimated performances are closely matched by the simulated ones.

ACS Style

Noor- A- Rahim; Zilong Liu; Yong Liang Guan; Lajos Hanzo. Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation. IEEE Transactions on Vehicular Technology 2020, 69, 12277 -12280.

AMA Style

Noor- A- Rahim, Zilong Liu, Yong Liang Guan, Lajos Hanzo. Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation. IEEE Transactions on Vehicular Technology. 2020; 69 (10):12277-12280.

Chicago/Turabian Style

Noor- A- Rahim; Zilong Liu; Yong Liang Guan; Lajos Hanzo. 2020. "Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation." IEEE Transactions on Vehicular Technology 69, no. 10: 12277-12280.

Journal article
Published: 22 July 2020 in IEEE Access
Reads 0
Downloads 0

The evolution of technologies for the capture of human movement has been motivated by a number of potential applications across a wide variety of fields. However, capturing human motion in 3D is difficult in an outdoor environment when it is performed without controlled surroundings. In this paper, a stereo camera rig with an ultra-wide baseline distance and conventional cameras with fish-eye lenses is proposed. Its cameras provide a wide field of view (FOV) which increases the coverage area and also enables the baseline distance to be increased to cover the common area required for both cameras’ views to perform as a stereo camera. We propose a passive marker-based approach to track the motion of the object. In this method, an adaptive thresholding method is applied to extract each small pink polyester marker from the video frames. As the cameras have fish-eye lenses, it is difficult to estimate the depth information using a pinhole camera model. We use a unique method to restore the 3D positions by developing a relationship between the pixel dimensions and distances in an image and real world coordinates. In this paper, occlusion detection is considered because, in the marker-based capturing of articulated human kinematics, the occlusion of a marker is one of the major challenges. The detection algorithm differentiates among types of occlusions and predicts any missing marker position where necessary. As this design is intended to be mounted on a moving carrier, such as a drone or car, a method for compensating the camera’s ego-motion is proposed. The proposed 3D positioning and tracking system is tested in different situations to validate its applicability as a stereo camera rig as well as its performance for motion capture. The performance of the proposed system is compared with that of a standard motion capture system called Vicon and is shown to have the same order of accuracy while incurring less cost.

ACS Style

Atiqul Islam; Asikuzzaman; Mohammad Omar Khyam; Noor- A- Rahim; Mark R. Pickering. Stereo Vision-Based 3D Positioning and Tracking. IEEE Access 2020, 8, 138771 -138787.

AMA Style

Atiqul Islam, Asikuzzaman, Mohammad Omar Khyam, Noor- A- Rahim, Mark R. Pickering. Stereo Vision-Based 3D Positioning and Tracking. IEEE Access. 2020; 8 (99):138771-138787.

Chicago/Turabian Style

Atiqul Islam; Asikuzzaman; Mohammad Omar Khyam; Noor- A- Rahim; Mark R. Pickering. 2020. "Stereo Vision-Based 3D Positioning and Tracking." IEEE Access 8, no. 99: 138771-138787.

Journal article
Published: 03 July 2020 in IEEE Sensors Journal
Reads 0
Downloads 0

Ultrasonic technology is a tool in the area of indoor positioning systems (IPSs) and has been extensively used in many applications. In ultrasonic IPSs (UIPSs), the use of a chirp signal (in which the frequency varies with time) is widespread due to its capability to obtain high-range resolution through its time-frequency characteristic. It also provides an opportunity to design effective waveform diversity which has always been the key to mitigating multiple-access interference (MAI) in multi-user UIPSs. To explore this, we analyze the chirp signal from the signal design perspective, with the goal of developing a precise and efficient UIPS for multi-user environments. To achieve this, three waveform diversity design schemes are proposed in which all the benefits of the classical chirp, such as high-range resolution, are retained while all the transmitters can transmit chirp signals simultaneously. In each scheme, a linear chirp is divided into two linear sub-chirps with diverse durations and/or bandwidths. This process is optimized by selecting the concatenated sub-chirps that generate a waveform which has a high-range resolution and relatively low interference in the same scheme. Initially, the effectiveness of the proposed schemes is evaluated for five simultaneous excitation signals using several metrics and experimental results are then presented for the ultrasonic indoor positioning.

ACS Style

Mohammad Omar Khyam; Noor-A.- Rahim; Xinde Li; Aruna Jayasuriya; Apel Mahmud; Amanullah Maung Than Oo; Shuzhi Sam Ge. Simultaneous Excitation Systems for Ultrasonic Indoor Positioning. IEEE Sensors Journal 2020, 20, 13716 -13725.

AMA Style

Mohammad Omar Khyam, Noor-A.- Rahim, Xinde Li, Aruna Jayasuriya, Apel Mahmud, Amanullah Maung Than Oo, Shuzhi Sam Ge. Simultaneous Excitation Systems for Ultrasonic Indoor Positioning. IEEE Sensors Journal. 2020; 20 (22):13716-13725.

Chicago/Turabian Style

Mohammad Omar Khyam; Noor-A.- Rahim; Xinde Li; Aruna Jayasuriya; Apel Mahmud; Amanullah Maung Than Oo; Shuzhi Sam Ge. 2020. "Simultaneous Excitation Systems for Ultrasonic Indoor Positioning." IEEE Sensors Journal 20, no. 22: 13716-13725.

Journal article
Published: 01 July 2020 in IEEE Transactions on Vehicular Technology
Reads 0
Downloads 0

Vehicle to vehicle (V2V) communication using dedicated short range communications (DSRC) is considered a promising technology for enhancing road safety. However, in V2V communications, passenger cars suffer from obstruction of bigger vehicles such as buses or trucks. Based on our measurement, a big vehicle can cause a signal loss from 10 to 15 dB due to shadowing. This results in a shorter communication range and reduces the safety message dissemination capability. In this paper, we analyze the impact of shadowing caused by multiple big vehicles on the V2V communication of passenger cars. We propose a model which takes into account both geometric and stochastic shadowing of multiple big vehicles. In order to cope with the physical size of vehicles and safety distance between them in the real world, we propose to use a repulsive point process called hardcore repulsive Poisson point process (PPP) to model the locations of vehicles. Generating procedure and some basic properties of this process are introduced. Based on the proposed model, we derive the average length of the shadow region and the shadowing loss caused by multiple big vehicles. We show that when the number of big vehicles increases from 10% to 80% of total vehicles in one lane, the shadow region increases from 50 m to 450 m on the road. Furthermore, the shadowing loss causes the relative number of cars within communication range of a typical car to reduce from 90% to between 15% and 50%, depending on whether the big vehicles are in the same or the adjacent lane of the consider car. We analyse the packet collision probability while taking into consideration the big vehicle shadow region and observe significant packet collisions without dedicated bus lanes.

ACS Style

Hieu T. Nguyen; Xu Xiaoli; Noor- A- Rahim; Yong Liang Guan; Dirk Pesch; Hong Li; Alessio Filippi. Impact of Big Vehicle Shadowing on Vehicle-to-Vehicle Communications. IEEE Transactions on Vehicular Technology 2020, 69, 6902 -6915.

AMA Style

Hieu T. Nguyen, Xu Xiaoli, Noor- A- Rahim, Yong Liang Guan, Dirk Pesch, Hong Li, Alessio Filippi. Impact of Big Vehicle Shadowing on Vehicle-to-Vehicle Communications. IEEE Transactions on Vehicular Technology. 2020; 69 (7):6902-6915.

Chicago/Turabian Style

Hieu T. Nguyen; Xu Xiaoli; Noor- A- Rahim; Yong Liang Guan; Dirk Pesch; Hong Li; Alessio Filippi. 2020. "Impact of Big Vehicle Shadowing on Vehicle-to-Vehicle Communications." IEEE Transactions on Vehicular Technology 69, no. 7: 6902-6915.

Journal article
Published: 09 June 2020 in IEEE Systems Journal
Reads 0
Downloads 0

Smart grid is expected to make use of Internet-of-Things (IoT) networks to reliably monitor its state from remote places.However, due to a potentially unstable nature of a smart grid plant, in particular, when using renewable energy sources, and an unreliable wireless channel used in IoT, it is a challenging task to reliably track the state of smart grids. This article proposes a robust communication framework for state estimation/tracking of unstable microgrids, which is a key component of a smart grid. We present an IoT-integrated smart grid system to monitor the status of microgrids over a wireless network. A delay-universal-based error correction code is utilized to achieve a reliable and real-time estimation of microgrids. To exploit the features of the delay-universal coding scheme, we propose an iterative estimation technique. Through numerical results, we show that the proposed scheme can closely track the state of an unstable microgrid. We also show the impact of wireless network parameters on the estimation performance. The estimation performance of the proposed scheme is compared with the estimation performance of a traditional error correction coding scheme. We show that the proposed scheme substantially outperforms the traditional scheme.

ACS Style

Noor- A- Rahim; Mohammad Omar Khyam; Apel Mahmud; Tanvir Ishtaique Ul Huque; Xinde Li; Dirk Pesch; Amanullah M. T. Oo. Robust and Real-Time State Estimation of Unstable Microgrids Over IoT Networks. IEEE Systems Journal 2020, 15, 2176 -2185.

AMA Style

Noor- A- Rahim, Mohammad Omar Khyam, Apel Mahmud, Tanvir Ishtaique Ul Huque, Xinde Li, Dirk Pesch, Amanullah M. T. Oo. Robust and Real-Time State Estimation of Unstable Microgrids Over IoT Networks. IEEE Systems Journal. 2020; 15 (2):2176-2185.

Chicago/Turabian Style

Noor- A- Rahim; Mohammad Omar Khyam; Apel Mahmud; Tanvir Ishtaique Ul Huque; Xinde Li; Dirk Pesch; Amanullah M. T. Oo. 2020. "Robust and Real-Time State Estimation of Unstable Microgrids Over IoT Networks." IEEE Systems Journal 15, no. 2: 2176-2185.

Journal article
Published: 16 March 2020 in IEEE Transactions on Vehicular Technology
Reads 0
Downloads 0

This paper considers the network- and application-level reliabilities for connected vehicles under path loss environments. We derive a probabilistic framework for estimating reliabilities that is applicable with various path loss models. We also build a realistic connected vehicle traffic simulation environment and use it to perform extensive experiments considering semi-urban traffic. The results show that the achievable reliability performances differ significantly with the path loss models considered. For a moderate communication distance between a transmitter and a receiver, with established deterministic and stochastic path loss models, the network-level reliability is around 55%, whereas with the realistic path loss models that consider obstacles and traffic, the reliability falls below 30%. To improve the network- and application-level reliabilities, we propose a feedbackless relaying mechanism that can be deployed on top of IEEE 802.11p, where, the relay vehicle selection is done autonomously. The relaying mechanism improves the network-level and application-level reliabilities by at least 35% for the studied path loss models.

ACS Style

G. G. Md. Nawaz Ali; Beshah Ayalew; Ardalan Vahidi; Noor- A- Rahim. Feedbackless Relaying for Enhancing Reliability of Connected Vehicles. IEEE Transactions on Vehicular Technology 2020, 69, 4621 -4634.

AMA Style

G. G. Md. Nawaz Ali, Beshah Ayalew, Ardalan Vahidi, Noor- A- Rahim. Feedbackless Relaying for Enhancing Reliability of Connected Vehicles. IEEE Transactions on Vehicular Technology. 2020; 69 (5):4621-4634.

Chicago/Turabian Style

G. G. Md. Nawaz Ali; Beshah Ayalew; Ardalan Vahidi; Noor- A- Rahim. 2020. "Feedbackless Relaying for Enhancing Reliability of Connected Vehicles." IEEE Transactions on Vehicular Technology 69, no. 5: 4621-4634.

Journal article
Published: 27 February 2020 in IEEE Transactions on Industrial Informatics
Reads 0
Downloads 0

Multi-sensor fusion strategies have been widely applied in Human Activity Recognition (HAR) in Body Sensor Networks (BSNs). However, the sensory data collected by BSNs systems are often uncertain or even incomplete. Thus, designing a robust and intelligent sensor fusion strategy is necessary for high-quality activity recognition. In this paper, Dezert-Smarandache Theory (DSmT) is used to develop a novel sensor fusion strategy for HAR in BSNs, which can effectively improve the accuracy of recognition. Specifically, in the training stage, the Kernel Density Estimation (KDE) based models are first built and then precisely selected for each specific activity according to the proposed discriminative functions. After that, a structure of Basic Belief Assignment (BBA) can be constructed, using the relationship between the test data of unknown class and the selected KDE models of all considered types of activities. In order to deal with the conflict between the obtained BBAs, Proportional Conflict Redistribution-6 (PCR6) is applied to fuse the acquired BBAs. Moreover, the missing data of the involved sensors are addressed as ignorance in the framework of the DSmT without manual interpolation or intervention. Experimental studies on two real-world activity recognition datasets (The OPPORTUNITY dataset; Daily and Sports Activity Dataset (DSAD)) were conducted, and the results showed the superiority of our proposed method over some state-of-the-art approaches proposed in the literature.

ACS Style

Yilin Dong; Xinde Li; Jean Dezert; Mohammad Omar Khyam; Noor- A- Rahim; Shuzhi Sam Ge. Dezert-Smarandache Theory-Based Fusion for Human Activity Recognition in Body Sensor Networks. IEEE Transactions on Industrial Informatics 2020, 16, 7138 -7149.

AMA Style

Yilin Dong, Xinde Li, Jean Dezert, Mohammad Omar Khyam, Noor- A- Rahim, Shuzhi Sam Ge. Dezert-Smarandache Theory-Based Fusion for Human Activity Recognition in Body Sensor Networks. IEEE Transactions on Industrial Informatics. 2020; 16 (11):7138-7149.

Chicago/Turabian Style

Yilin Dong; Xinde Li; Jean Dezert; Mohammad Omar Khyam; Noor- A- Rahim; Shuzhi Sam Ge. 2020. "Dezert-Smarandache Theory-Based Fusion for Human Activity Recognition in Body Sensor Networks." IEEE Transactions on Industrial Informatics 16, no. 11: 7138-7149.

Journal article
Published: 10 September 2019 in IEEE/ACM Transactions on Computational Biology and Bioinformatics
Reads 0
Downloads 0

DNA has become an attractive medium for long-term data archiving due to its extremely high storage density and longevity. Short single-stranded DNAs, called oligonucleotides (oligos), have been designed and synthesized to store digital data. Previous works designed the oligos with a pair of primer binding sites (PBSs) (each with a length of around 200) attached at the two ends of each basic readable data block. The addition of PBSs decreases the data density significantly because in the current DNA synthesis, the maximum length of a synthesized oligo in good quality is around 200. Furthermore, the maximum homopolymer run allowed by the existing experiments has been reported to be 3 nucleotides. In this work, to increase the data density, we have devised and tested an oligo design for DNA-based storage with the basic readable data block appended by a single PBS at one end only, while allowing the maximum homopolymer run to be increased to 4. We also present an oligo assembly algorithm that can reconstruct oligos with a single PBS from the error-prone raw readouts obtained from the sequencing process. We have conducted a wet lab experiment to validate the proposed design, where we tested with 398KB of data stored into 10,750 oligos. The experimental results show that it is possible to recover over 99% of the oligo sequences without error, which proves that one PBS is sufficient for implementing a DNA-based data storage system with maximum homopolymer run relaxed to 4. The use of single PBS leads to a significant data density gain from 14.3% to 140.2% over the existing short-strand DNA data storage schemes by reserving more nucleotides for storing information bits.

ACS Style

Yixin Wang; Noor- A- Rahim; Jingyun Zhang; Erry Gunawan; Yong Liang Guan; Chueh Loo Poh. Oligo Design with Single Primer Binding Site for High Capacity DNA-Based Data Storage. IEEE/ACM Transactions on Computational Biology and Bioinformatics 2019, 17, 2176 -2182.

AMA Style

Yixin Wang, Noor- A- Rahim, Jingyun Zhang, Erry Gunawan, Yong Liang Guan, Chueh Loo Poh. Oligo Design with Single Primer Binding Site for High Capacity DNA-Based Data Storage. IEEE/ACM Transactions on Computational Biology and Bioinformatics. 2019; 17 (6):2176-2182.

Chicago/Turabian Style

Yixin Wang; Noor- A- Rahim; Jingyun Zhang; Erry Gunawan; Yong Liang Guan; Chueh Loo Poh. 2019. "Oligo Design with Single Primer Binding Site for High Capacity DNA-Based Data Storage." IEEE/ACM Transactions on Computational Biology and Bioinformatics 17, no. 6: 2176-2182.

Journal article
Published: 21 August 2019 in IEEE Transactions on Vehicular Technology
Reads 0
Downloads 0

An autonomous V2V communication mode (also known as side-link mode 4), which facilitates V2V communication in out of eNB coverage areas, has recently been introduced into the Long term evolution (LTE) standard. Recent research has studied the performance of this LTE-V2V autonomous mode for a highway use case. However, performance analysis for a highway use case cannot be easily applied to an intersection use case as it may contain non-line-of-sight (NLOS) communication links. In this paper, we analyze and evaluate the safety message broadcasting performance of LTE-V2V autonomous mode in an urban intersection scenario. Considering practical path loss models, we present the impact of NLOS communication link on the overall message dissemination performance. Through the analytical and simulation results, we show that the overall message dissemination performance degrades drastically with increasing vehicle density and increasing distance of the transmitting vehicle from the intersection. To improve the performance, we propose a vehicle-assisted relaying scheme in which the relaying vehicle is selected in an autonomous manner. We also present two resource allocation strategies for the relaying vehicle. For low to medium vehicle density along the street, we observe significant improvement in message dissemination through relaying compared to the scheme without relaying.

ACS Style

Noor- A- Rahim; G. G. Md. Nawaz Ali; Yong Liang Guan; Beshah Ayalew; Peter Han Joo Chong; Dirk Pesch. Broadcast Performance Analysis and Improvements of the LTE-V2V Autonomous Mode at Road Intersection. IEEE Transactions on Vehicular Technology 2019, 68, 9359 -9369.

AMA Style

Noor- A- Rahim, G. G. Md. Nawaz Ali, Yong Liang Guan, Beshah Ayalew, Peter Han Joo Chong, Dirk Pesch. Broadcast Performance Analysis and Improvements of the LTE-V2V Autonomous Mode at Road Intersection. IEEE Transactions on Vehicular Technology. 2019; 68 (10):9359-9369.

Chicago/Turabian Style

Noor- A- Rahim; G. G. Md. Nawaz Ali; Yong Liang Guan; Beshah Ayalew; Peter Han Joo Chong; Dirk Pesch. 2019. "Broadcast Performance Analysis and Improvements of the LTE-V2V Autonomous Mode at Road Intersection." IEEE Transactions on Vehicular Technology 68, no. 10: 9359-9369.

Journal article
Published: 01 April 2019 in Sensors
Reads 0
Downloads 0

The use of renewable energy has increased dramatically over the past couple of decades. Wind farms, consisting of wind turbines, play a vital role in the generation of renewable energy. For monitoring and maintenance purposes, a wind turbine has a variety of sensors to measure the state of the turbine. Sensor measurements are transmitted to a control center, which is located away from the wind farm, for monitoring and maintenance purposes. It is therefore desirable to ensure reliable wireless communication between the wind turbines and the control center while integrating the observations from different sensors. In this paper, we propose an IoT based communication framework for the purpose of reliable communication between wind turbines and control center. The communication framework is based on repeat-accumulate coded communication to enhance reliability. A fusion algorithm is proposed to exploit the observations from multiple sensors while taking into consideration the unpredictable nature of the wireless channel. The numerical results show that the proposed scheme can closely predict the state of a wind turbine. We also show that the proposed scheme significantly outperforms traditional estimation schemes.

ACS Style

Noor- A- Rahim; M. O. Khyam; Xinde Li; Dirk Pesch. Sensor Fusion and State Estimation of IoT Enabled Wind Energy Conversion System. Sensors 2019, 19, 1566 .

AMA Style

Noor- A- Rahim, M. O. Khyam, Xinde Li, Dirk Pesch. Sensor Fusion and State Estimation of IoT Enabled Wind Energy Conversion System. Sensors. 2019; 19 (7):1566.

Chicago/Turabian Style

Noor- A- Rahim; M. O. Khyam; Xinde Li; Dirk Pesch. 2019. "Sensor Fusion and State Estimation of IoT Enabled Wind Energy Conversion System." Sensors 19, no. 7: 1566.

Research article
Published: 01 January 2019 in IET Communications
Reads 0
Downloads 0

This study investigates the performance of a bidirectional/two-way relaying scheme with an energy-harvesting relay while amplify-and-forward relaying is performed. With multiple antennas at the relay, the authors propose the use of the max–min antenna selection scheme in the context of an energy harvesting scenario. They show that the proposed scheme attains diversity gain, whereby its end-to-end symbol error probability performance improves with increments in the number of energy harvesting relay antennas. For limited battery capacity at the energy harvesting node, they derive the lower bound of the outage probabilities and observe a good match between the analytical and simulated results. For this scenario, a simple power provisioning technique is proposed to optimise the end nodes' transmission powers. It is observed that the proposed technique saves significantly more transmission energy than the conventional equal power provisioning technique.

ACS Style

Noor‐ A‐ Rahim; Mohammad Omar Khyam; Yong Liang Guan. Energy harvesting two‐way relaying with antenna selection scheme. IET Communications 2019, 13, 198 -204.

AMA Style

Noor‐ A‐ Rahim, Mohammad Omar Khyam, Yong Liang Guan. Energy harvesting two‐way relaying with antenna selection scheme. IET Communications. 2019; 13 (2):198-204.

Chicago/Turabian Style

Noor‐ A‐ Rahim; Mohammad Omar Khyam; Yong Liang Guan. 2019. "Energy harvesting two‐way relaying with antenna selection scheme." IET Communications 13, no. 2: 198-204.

Journal article
Published: 01 September 2018 in ICT Express
Reads 0
Downloads 0

This paper presents the performance analysis of two-time-slot two-way relaying while considering dual antennas at the relay and imperfect channel state information (CSI) at the receivers. We consider the Max-Min antenna selection scheme at the relay. For this scheme, we show the analytical symbol error probability in the presence of imperfect CSI and observe a close match between the analytical and numerical results. We also find that Max-Min antenna selection scheme is robust against CSI error and performs better than the maximum ratio transmission (MRT) based beamforming scheme in the presence of CSI error.

ACS Style

Noor- A- Rahim; Yong Liang Guan. Impact of estimation error on two-way relaying with relay antenna selection. ICT Express 2018, 4, 149 -153.

AMA Style

Noor- A- Rahim, Yong Liang Guan. Impact of estimation error on two-way relaying with relay antenna selection. ICT Express. 2018; 4 (3):149-153.

Chicago/Turabian Style

Noor- A- Rahim; Yong Liang Guan. 2018. "Impact of estimation error on two-way relaying with relay antenna selection." ICT Express 4, no. 3: 149-153.

Journal article
Published: 05 July 2018 in IEEE Access
Reads 0
Downloads 0

In this paper, the design of error-correcting or channel codes for delay-universal/anytime communication is shown while considering systems with and without a feedback link. We construct practical and low complexity anytime channel codes based on spatially coupled repeat-accumulate (SC-RA) codes. Performance and density evolution analysis are shown for the binary erasure channel (BEC) and the binary input additive white Gaussian noise (BIAWGN) channel. We observe that erasure/error floors exists even at low decoding delay in the following cases: (i) when the code rate is close to the Shannon capacity; and/or (ii) when the code parameters are chosen to target a high decaying rate of erasure/error probability. To mitigate erasure/error floors, we present feedback algorithms for BEC and BIAWGN channels. We show that the proposed feedback strategies can greatly enhance the performance of anytime SC-RA codes. Numerical results also show that feedback strategies significantly reduce the decoder complexity. The proposed feedback approach is applied to an aircraft tracking application to track/calculate/estimate the state information of the aircraft. Based on comparisons of the results obtained from the traditional block and anytime coding scenarios, it is observed that the latter significantly outperforms the former in terms of tracking performance.

ACS Style

Noor- A- Rahim; Mohammad Omar Khyam; Yong Liang Guan; G. G. Md. Nawaz Ali; Khoa D. Nguyen; Gottfried Lechner. Delay-Universal Channel Coding With Feedback. IEEE Access 2018, 6, 37918 -37931.

AMA Style

Noor- A- Rahim, Mohammad Omar Khyam, Yong Liang Guan, G. G. Md. Nawaz Ali, Khoa D. Nguyen, Gottfried Lechner. Delay-Universal Channel Coding With Feedback. IEEE Access. 2018; 6 (99):37918-37931.

Chicago/Turabian Style

Noor- A- Rahim; Mohammad Omar Khyam; Yong Liang Guan; G. G. Md. Nawaz Ali; Khoa D. Nguyen; Gottfried Lechner. 2018. "Delay-Universal Channel Coding With Feedback." IEEE Access 6, no. 99: 37918-37931.

Journal article
Published: 18 June 2018 in Information
Reads 0
Downloads 0

This paper is focused on a vehicle-to-vehicle (V2V) communication system operating at a road intersection, where the communication links can be either line-of-sight (LOS) or non-line-of-sight (NLOS). We present a semi-empirical analysis of the packet delivery ratio of dedicated short-range communication (DSRC) safety messages for both LOS and NLOS scenarios using a commercial transceiver. In a NLOS scenario in which the reception of a safety message may be heavily blocked by concrete buildings, direct communication between the on-board units (OBUs) of vehicles through the IEEE 802.11p standard tends to be unreliable. On the basis of the semi-empirical result of safety message delivery at an intersection, we propose two relaying mechanisms (namely, simple relaying and network-coded relaying) via a road-side unit (RSU) to improve the delivery ratio of safety messages. Specifically, we designed RSU algorithms to optimize the number of relaying messages so as to maximize the message delivery ratio of the entire system in the presence of data packet collisions. Numerical results show that our proposed relaying schemes lead to a significant increase in safety message delivery rates.

ACS Style

Hieu Nguyen; Noor- A- Rahim; Zilong Liu; Dayana Jamaludin; Yong Liang Guan. A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections. Information 2018, 9, 147 .

AMA Style

Hieu Nguyen, Noor- A- Rahim, Zilong Liu, Dayana Jamaludin, Yong Liang Guan. A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections. Information. 2018; 9 (6):147.

Chicago/Turabian Style

Hieu Nguyen; Noor- A- Rahim; Zilong Liu; Dayana Jamaludin; Yong Liang Guan. 2018. "A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections." Information 9, no. 6: 147.

Journal article
Published: 11 June 2018 in IEEE Sensors Journal
Reads 0
Downloads 0

In ultrasonic positioning systems (UPSs) chirp waveforms have attracted much attention due to its high range resolution. However, the multiple-access schemes for chirp-based UPS are limited. In its application to multiple-access ultrasonic positioning, effective waveform diversity design is a prerequisite. In a multiple-access UPS, each transmitter should transmit a unique waveform with impulse-like auto-correlation and relatively flat cross-correlations to the waveforms transmitted by other transmitters. Proposed in this paper is a methodology whereby multiple transmitters can transmit chirp signals simultaneously. The chirp waveforms are constructed by concatenating a number of linear sub-chirps of the same durations and bandwidths but different starting and stopping frequencies. This process is optimized by selecting sequences with impulse-like auto-correlations and relatively flat cross-correlations. Firstly, the efficiency of the proposed methodology is evaluated by several metrics and then, in an indoor environment, through simulations and experiments for ultrasonic positioning.

ACS Style

Mohammad Omar Khyam; Noor- A- Rahim; Xinde Li; Christian Ritz; Yong Liang Guan; Shuzhi Sam Ge. Design of Chirp Waveforms for Multiple-Access Ultrasonic Indoor Positioning. IEEE Sensors Journal 2018, 18, 6375 -6390.

AMA Style

Mohammad Omar Khyam, Noor- A- Rahim, Xinde Li, Christian Ritz, Yong Liang Guan, Shuzhi Sam Ge. Design of Chirp Waveforms for Multiple-Access Ultrasonic Indoor Positioning. IEEE Sensors Journal. 2018; 18 (15):6375-6390.

Chicago/Turabian Style

Mohammad Omar Khyam; Noor- A- Rahim; Xinde Li; Christian Ritz; Yong Liang Guan; Shuzhi Sam Ge. 2018. "Design of Chirp Waveforms for Multiple-Access Ultrasonic Indoor Positioning." IEEE Sensors Journal 18, no. 15: 6375-6390.

Conference paper
Published: 01 May 2018 in 2018 IEEE International Conference on Communications (ICC)
Reads 0
Downloads 0

Recently, much attentions have been paid to network coding-assisted data broadcast in vehicular networks. However, majority of the works consider all the accessed data items are the same size. In this work, we have studied the network coding-assisted heterogeneous on-demand data access in vehicular networks. Firstly, we have investigated the less efficiency of conventional coding assisted approach in accessing heterogeneous data items in real-time vehicular environment. Due to ignoring the impact of heterogeneous data items in decoding, the conventional coding does not achieve expected performance in accessing data items with diverse size. Secondly, based on our observations, we have proposed a new algorithm. The proposed network coding assisted approach exploits the different MCSs (Modulation and coding schemes) of IEEE 802.11p physical layer for leveraging the variable serving rate considering the dynamic positions' of vehicles along with the vehicle mobility. Thirdly, we have built a vehicular simulation environment and evaluated the performance of the proposed approach along with competitive no-coding and coding-assisted approaches under various circumstances. The results show that the proposed approach outperforms the state-of-the-art approaches in terms of improving the on-demand requests serving capability and reducing the data access time.

ACS Style

G. G. M. Nawaz Ali; Noor- A- Rahim; A. Rahman; S. K. Samantha; Peter H. J. Chong; Y. L. Guan. An Efficient Cross-Layer Coding-Assisted Heterogeneous Data Access in Vehicular Networks. 2018 IEEE International Conference on Communications (ICC) 2018, 1 -7.

AMA Style

G. G. M. Nawaz Ali, Noor- A- Rahim, A. Rahman, S. K. Samantha, Peter H. J. Chong, Y. L. Guan. An Efficient Cross-Layer Coding-Assisted Heterogeneous Data Access in Vehicular Networks. 2018 IEEE International Conference on Communications (ICC). 2018; ():1-7.

Chicago/Turabian Style

G. G. M. Nawaz Ali; Noor- A- Rahim; A. Rahman; S. K. Samantha; Peter H. J. Chong; Y. L. Guan. 2018. "An Efficient Cross-Layer Coding-Assisted Heterogeneous Data Access in Vehicular Networks." 2018 IEEE International Conference on Communications (ICC) , no. : 1-7.

Journal article
Published: 25 April 2018 in IEEE Internet of Things Journal
Reads 0
Downloads 0

Through the embedded processors and communication technologies, vehicles are increasingly being connected with the Internet of Things. Recently, much attentions have been paid to network-coding-assisted data broadcast in vehicular networks. However, majority of the works consider all the accessed data items are the same size. In this work, we have studied the network coding-assisted heterogeneous on-demand real-time data access in vehicular networks. Firstly, we have investigated the less efficiency of conventional coding-assisted approach in accessing heterogeneous data items in real-time vehicular environment. Due to ignoring the impact of heterogeneous data items in decoding, the conventional coding does not achieve expected performance in accessing data items with diverse size. Secondly, based on our observations, for efficiently serving heterogeneous data items, we have proposed a dynamic threshold based coding-assisted real-time data broadcast approach called EDF. Thirdly, we have derived the probabilistic analysis of the system performance of the proposed approach and the state-of-the-art approaches. Fourthly, based on our further investigations, we have proposed another approach, called ISXD. The proposed network-coding-assisted ISXD exploits the different MCSs (Modulation and coding scheme) of IEEE 802.11p physical layer for leveraging the variable serving rate considering the dynamic positions of vehicles along with the vehicle mobility. The comprehensive simulation results demonstrate the efficacy of the proposed approaches over the state-of-the-art approaches in terms of improving the on-demand requests serving capability and reducing the system response time.

ACS Style

G. G. Md. Nawaz Ali; Noor- A- Rahim; Ashiqur Rahman; Syeda Khairunnesa Samantha; Peter Han Joo Chong; Yong Liang Guan. Efficient Real-Time Coding-Assisted Heterogeneous Data Access in Vehicular Networks. IEEE Internet of Things Journal 2018, 5, 3499 -3512.

AMA Style

G. G. Md. Nawaz Ali, Noor- A- Rahim, Ashiqur Rahman, Syeda Khairunnesa Samantha, Peter Han Joo Chong, Yong Liang Guan. Efficient Real-Time Coding-Assisted Heterogeneous Data Access in Vehicular Networks. IEEE Internet of Things Journal. 2018; 5 (5):3499-3512.

Chicago/Turabian Style

G. G. Md. Nawaz Ali; Noor- A- Rahim; Ashiqur Rahman; Syeda Khairunnesa Samantha; Peter Han Joo Chong; Yong Liang Guan. 2018. "Efficient Real-Time Coding-Assisted Heterogeneous Data Access in Vehicular Networks." IEEE Internet of Things Journal 5, no. 5: 3499-3512.

Journal article
Published: 25 April 2018 in IEEE Access
Reads 0
Downloads 0

Dedicated short-range communication (DSRC), which is an essential part of vehicle-to-vehicle/infrastructure (V2X) communication to enhance the road safety, is often characterized by IEEE 802.11p standard. Numerous works have been done on the DSRC safety message broadcasting performance for highway scenario. However, till to date, no work has been done on the performance of the IEEE 802.11p safety message broadcasting for the road-intersection scenario in urban environment. An intersection scenario is different from a highway scenario. In a highway scenario, it is often been considered that all the vehicles have the same communication range as well as the same carrier sensing range. However, this is not the case for the intersection scenario, where there exist a lot of obstructions, such as buildings, urban canyons etc. In an intersection, the communication and carrier sensing ranges of a vehicle heavily depend on the location of that vehicle. This work firstly analyzes and then provides solution on improving the broadcasting performance of the DSRC safety message at an intersection while considering IEEE 802.11p enhanced distributed channel access (EDCA) mechanism. To facilitate different communication and carrier sensing ranges of different vehicles, we divide the intersection region into few parts/areas based on an empirically validated path loss model. We present an analytical study on the packet reception rates and channel access delay which is applicable for the different positions of transmitters and receivers in the intersection areas. The analytical results are verified by the NS-3 simulation. From the results, we find that the overall delivery ratio is very poor when the broadcasting vehicle is not close-enough to the intersection-centre. To improve the overall broadcast performance of such scenarios, we employ a road side unit (RSU) at the intersection-centre to relay the safety messages once. We show the performance improvement via relaying, while firstly using omni-directional and then using special sector antennas, so called bidirectional antenna, at the RSU. From the results, it is shown that relaying with the omni-directional antenna gives moderate improvement on the overall delivery ratio, while a significant improvement can be achieved by relaying with sector antenna.

ACS Style

Noor- A- Rahim; G. G. Md. Nawaz Ali; Hieu Nguyen; Yong Liang Guan. Performance Analysis of IEEE 802.11p Safety Message Broadcast With and Without Relaying at Road Intersection. IEEE Access 2018, 6, 23786 -23799.

AMA Style

Noor- A- Rahim, G. G. Md. Nawaz Ali, Hieu Nguyen, Yong Liang Guan. Performance Analysis of IEEE 802.11p Safety Message Broadcast With and Without Relaying at Road Intersection. IEEE Access. 2018; 6 (99):23786-23799.

Chicago/Turabian Style

Noor- A- Rahim; G. G. Md. Nawaz Ali; Hieu Nguyen; Yong Liang Guan. 2018. "Performance Analysis of IEEE 802.11p Safety Message Broadcast With and Without Relaying at Road Intersection." IEEE Access 6, no. 99: 23786-23799.