This page has only limited features, please log in for full access.
Energy conservation has always been a prominent design goal for hierarchical routing protocols supporting sink mobility. Advertising the current position of mobile sink introduces control packet overhead which ultimately results in an increase in energy consumption and shorter network lifetime. Energy harvesting through ambient sources have enabled the utilization of rechargeable devices for Wireless Sensor Networks to perpetually remain operational. The modifications in the hierarchical structure of wireless sensor networks along with energy scavenging approaches could possibly minimize the control packet overhead and also provide a significant improvement in energy conservation. In this paper, we propose a novel Harvested Energy Scavenging and Transfer capabilities in Opportunistic Ring Routing protocol which uses a distinguishing approach of hybrid (ring + cluster) topology in which the network architecture is initially supported by the formation of a virtual ring structure and then a two-tier routing topology is used in the virtual ring as an overlay by grouping nodes into clusters. The rate of energy gain from solar harvesting and radio frequency transfer is the criterion for selecting cluster heads. The role of cluster heads is exploited to advertise the mobile sink current position as well as forward the aggregated data towards mobile sink using energy transfer based opportunistic routing. The simulation results reveal that our scheme considerably outperforms the existing benchmarks in terms of control packet overhead, energy conservation, network lifetime, packet delivery ratio and average end-end delay.
Junaid Anees; Hao-Chun Zhang; Bachirou Guene Lougou; Sobia Baig; Yabibal Getahun Dessie; Yiyi Li. Harvested Energy Scavenging and Transfer capabilities in Opportunistic Ring Routing. IEEE Access 2021, 9, 75801 -75825.
AMA StyleJunaid Anees, Hao-Chun Zhang, Bachirou Guene Lougou, Sobia Baig, Yabibal Getahun Dessie, Yiyi Li. Harvested Energy Scavenging and Transfer capabilities in Opportunistic Ring Routing. IEEE Access. 2021; 9 ():75801-75825.
Chicago/Turabian StyleJunaid Anees; Hao-Chun Zhang; Bachirou Guene Lougou; Sobia Baig; Yabibal Getahun Dessie; Yiyi Li. 2021. "Harvested Energy Scavenging and Transfer capabilities in Opportunistic Ring Routing." IEEE Access 9, no. : 75801-75825.
The penetration of renewable generation, such as photovoltaic and wind power in power networks will significantly impact the system’s stability in future, due to randomness and intermittency in the natural environment. Moreover, the correlations between renewable generation may enhance the impact on power system's stability. In this paper, cumulant-based maximum entropy method (CMEM) combined with Nataf Transform (NT) is proposed to analyze the steady-state voltage stability problem considering correlations and uncertainties of power injections and consumptions. The proposed methodology is tested on the IEEE 30-node and IEEE 57-node test systems. Taking the results of Monte Carlo method (MCM) as the experimental control group, this paper compares the proposed method with series expansion method (SEM), discusses and analyzes their calculation results and speed under different scenarios, and the results of the comparison prove the validity, accuracy and rapidity of the CMEM.
Chengjun Xia; Xiaotian Zheng; Lin Guan; Sobia Baig. Probability analysis of steady-state voltage stability considering correlated stochastic variables. International Journal of Electrical Power & Energy Systems 2021, 131, 107105 .
AMA StyleChengjun Xia, Xiaotian Zheng, Lin Guan, Sobia Baig. Probability analysis of steady-state voltage stability considering correlated stochastic variables. International Journal of Electrical Power & Energy Systems. 2021; 131 ():107105.
Chicago/Turabian StyleChengjun Xia; Xiaotian Zheng; Lin Guan; Sobia Baig. 2021. "Probability analysis of steady-state voltage stability considering correlated stochastic variables." International Journal of Electrical Power & Energy Systems 131, no. : 107105.
The fourth Industrial Revolution is expected to lead to an era of technological innovation and digitization that would require connectivity by the users, anywhere and anytime. The fifth generation of wireless communication systems and the technologies therein are being explored to cater to high connectivity needs that encompass high data rates, very low latencies, energy-efficient systems, etc. A multiuser environment is anticipated that would require multiple access techniques, such as Nonorthogonal Multiple Access (NOMA). The user data in the power domain NOMA is superimposed, at the transmitter base station, which is in turn subjected to Successive Interference Cancellation at the user end. In the multiuser downlink, the desired user’s signal is subjected to imperfect SIC due to incomplete cancellation of the undesired user’s signal. Pulse-shaping of NOMA symbols using wavelet transform is proposed to mitigate the multiuser interference due to imperfect SIC. Closed-form symbol error rate (SER) expression is derived for the wavelet NOMA system for a three-user scenario. Analytical results show that wavelet transform pulse-shaped NOMA performs better compared to Fourier transform pulse-shaped NOMA symbols in mitigating SIC and thereby minimize the residual error due to imperfect SIC.
Muneeb Ahmad; Sobia Baig; Hafiz Muhammad Asif; Kaamran Raahemifar. Mitigation of Imperfect Successive Interference Cancellation and Wavelet-Based Nonorthogonal Multiple Access in the 5G Multiuser Downlink Network. Wireless Communications and Mobile Computing 2021, 2021, 1 -11.
AMA StyleMuneeb Ahmad, Sobia Baig, Hafiz Muhammad Asif, Kaamran Raahemifar. Mitigation of Imperfect Successive Interference Cancellation and Wavelet-Based Nonorthogonal Multiple Access in the 5G Multiuser Downlink Network. Wireless Communications and Mobile Computing. 2021; 2021 ():1-11.
Chicago/Turabian StyleMuneeb Ahmad; Sobia Baig; Hafiz Muhammad Asif; Kaamran Raahemifar. 2021. "Mitigation of Imperfect Successive Interference Cancellation and Wavelet-Based Nonorthogonal Multiple Access in the 5G Multiuser Downlink Network." Wireless Communications and Mobile Computing 2021, no. : 1-11.
This study investigates the feasibility of advanced metering infrastructure (AMI) based on narrowband power line communications (NB-PLC) by incorporating all possible types of low voltage (LV) and medium voltage (MV) power line channels. The extensive field measurements are carried out on six selected sites that include residential, commercial, and industrial LV and MV NB-PLC channels. On the basis of measured results, NB-PLC channels of various under evaluation sites are segregated into two classes i.e. worst and good channels for both LV and MV networks. The simulation models for the modelling of LV and MV NB-PLC channels by considering the practical data of measured sites are developed and thus proposed. The proposed methods are validated by comparing the measured and simulated results. A sophisticated mechanism for the modelling of LV and MV network impedances and capacitive coupling device is formulated. The proposed analyses and simulation-based NB-PLC channel models can play a key role in examining the characteristics of various types of NB-PLC channels. This research work will help to standardise the future smart metering equipment and sensing devices of power system protection.
Bilal Masood; Song Guobing; Sobia Baig; Muhammad Babar Rasheed; Junjie Hou. Measurements and characterisation of low and medium voltage residential, commercial, and industrial NB‐PLC networks for AMI. IET Generation, Transmission & Distribution 2020, 14, 6663 -6673.
AMA StyleBilal Masood, Song Guobing, Sobia Baig, Muhammad Babar Rasheed, Junjie Hou. Measurements and characterisation of low and medium voltage residential, commercial, and industrial NB‐PLC networks for AMI. IET Generation, Transmission & Distribution. 2020; 14 (26):6663-6673.
Chicago/Turabian StyleBilal Masood; Song Guobing; Sobia Baig; Muhammad Babar Rasheed; Junjie Hou. 2020. "Measurements and characterisation of low and medium voltage residential, commercial, and industrial NB‐PLC networks for AMI." IET Generation, Transmission & Distribution 14, no. 26: 6663-6673.
Today’s electricity grid is rapidly evolving, with increased penetration of renewable energy sources (RES). Conventional Optimal Power Flow (OPF) has non-linear constraints that make it a highly non-linear, non-convex optimisation problem. This complex problem escalates further with the integration of RES, which are generally intermittent in nature. In this article, an optimal power flow model combines three types of energy resources, including conventional thermal power generators, solar photovoltaic generators (SPGs) and wind power generators (WPGs). Uncertain power outputs from SPGs and WPGs are forecasted with the help of lognormal and Weibull probability distribution functions, respectively. The over and underestimation output power of RES are considered in the objective function i.e. as a reserve and penalty cost, respectively. Furthermore, to reduce carbon emissions, a carbon tax is imposed while formulating the objective function. A grey wolf optimisation technique (GWO) is employed to achieve optimisation in modified IEEE-30 and IEEE-57 bus test systems to demonstrate its feasibility. Hence, novel contributions of this work include the new objective functions and associated framework for optimising generation cost while considering RES; and, secondly, computational efficiency is improved by the use of GWO to address the non-convex OPF problem. To investigate the effectiveness of the proposed GWObased approach, it is compared in simulation to five other nature-inspired global optimisation algorithms and two well-established hybrid algorithms. For the simulation scenarios considered in this article, the GWO outperforms the other algorithms in terms of total cost minimisation and convergence time reduction.
Inam Ullah Khan; Nadeem Javaid; Kelum A. A. Gamage; C. James Taylor; Sobia Baig; Xiandong Ma. Heuristic Algorithm Based Optimal Power Flow Model Incorporating Stochastic Renewable Energy Sources. IEEE Access 2020, 8, 148622 -148643.
AMA StyleInam Ullah Khan, Nadeem Javaid, Kelum A. A. Gamage, C. James Taylor, Sobia Baig, Xiandong Ma. Heuristic Algorithm Based Optimal Power Flow Model Incorporating Stochastic Renewable Energy Sources. IEEE Access. 2020; 8 (99):148622-148643.
Chicago/Turabian StyleInam Ullah Khan; Nadeem Javaid; Kelum A. A. Gamage; C. James Taylor; Sobia Baig; Xiandong Ma. 2020. "Heuristic Algorithm Based Optimal Power Flow Model Incorporating Stochastic Renewable Energy Sources." IEEE Access 8, no. 99: 148622-148643.
This paper is focused on the channel modeling techniques for implementation of narrowband power line communication (NB-PLC) over medium voltage (MV) network for the purpose of advanced metering infrastructure (AMI). Three different types of models, based on deterministic method, statistical method, and network parameters based method are investigated in detail. Transmission line (TL) theory model is used to express the MV network as a two-port network to examine characteristics of sending and receiving NB-PLC signals. Multipath signal propagation model is used to incorporate the effect of multipath signals to determine the NB-PLC transfer function. A Simulink model is proposed which considers the values of MV network to examine the characteristics of NB-PLC signals. Frequency selectivity is also introduced in the impedances to compare variations and characteristics with constant impedances based MV network. A state-of-the-art mechanism for the modeling of capacitive coupling device, and impedances of low voltage (LV) and MV networks is developed. Moreover, a comparative analysis of TL theory and multipath signal propagation models with the proposed Simulink model is presented to validate the performance and accuracy of proposed model. This research work will pave the way to improve the efficiency of next-generation NB-PLC technologies.
Bilal Masood; M. Arif Khan; Sobia Baig; Song Guobing; Ateeq Ur Rehman; Saif Ur Rehman; Rao M. Asif; Muhammad Babar Rasheed; Guobing Song. Investigation of Deterministic, Statistical and Parametric NB-PLC Channel Modeling Techniques for Advanced Metering Infrastructure. Energies 2020, 13, 3098 .
AMA StyleBilal Masood, M. Arif Khan, Sobia Baig, Song Guobing, Ateeq Ur Rehman, Saif Ur Rehman, Rao M. Asif, Muhammad Babar Rasheed, Guobing Song. Investigation of Deterministic, Statistical and Parametric NB-PLC Channel Modeling Techniques for Advanced Metering Infrastructure. Energies. 2020; 13 (12):3098.
Chicago/Turabian StyleBilal Masood; M. Arif Khan; Sobia Baig; Song Guobing; Ateeq Ur Rehman; Saif Ur Rehman; Rao M. Asif; Muhammad Babar Rasheed; Guobing Song. 2020. "Investigation of Deterministic, Statistical and Parametric NB-PLC Channel Modeling Techniques for Advanced Metering Infrastructure." Energies 13, no. 12: 3098.
Non-orthogonal multiple access (NOMA) has been considered a key technology to address the increasing traffic demands for fifth-generation (5G) cellular wireless communication networks and internet of things. The NOMA technique offers efficient bandwidth utilisation, low latency, and support for the massive connectivity of devices in 5G networks. In the conventional NOMA system, orthogonal frequency division multiplexing (OFDM) is used as a pulse-shaping technique that causes high peak to average power ratio (PAPR) due to the superposition of signals of multiple users after passing through inverse fast Fourier transform and spectral inefficiency due to the cyclic prefix insertion. Therefore, an alternate methodology using wavelet OFDM is proposed in this research work, as a pulse-shaping technique for NOMA-based communication systems to improve spectral efficiency and system capacity The main contribution of this study is the analysis of the bit error rate (BER) performance and the effect of carrier frequency offset on system performance of wavelet NOMA (W-NOMA) technique in 5G networks. The simulation results demonstrate that W-NOMA outperforms the conventional NOMA with reference to PAPR and BER.
Usman Ali; Sobia Baig; Tariq Umer; Zhiguo Ding. Performance analysis of discrete wavelet transform for downlink non‐orthogonal multiple access in 5G networks. IET Communications 2020, 14, 1666 -1674.
AMA StyleUsman Ali, Sobia Baig, Tariq Umer, Zhiguo Ding. Performance analysis of discrete wavelet transform for downlink non‐orthogonal multiple access in 5G networks. IET Communications. 2020; 14 (10):1666-1674.
Chicago/Turabian StyleUsman Ali; Sobia Baig; Tariq Umer; Zhiguo Ding. 2020. "Performance analysis of discrete wavelet transform for downlink non‐orthogonal multiple access in 5G networks." IET Communications 14, no. 10: 1666-1674.
Limited energy resources of sensor nodes in Wireless Sensor Networks (WSNs) make energy consumption the most significant problem in practice. This paper proposes a novel, dynamic, self-organizing Hesitant Fuzzy Entropy-based Opportunistic Clustering and data fusion Scheme (HFECS) in order to overcome the energy consumption and network lifetime bottlenecks. The asynchronous working-sleeping cycle of sensor nodes could be exploited to make an opportunistic connection between sensor nodes in heterogeneous clustering. HFECS incorporates two levels of hierarchy in the network and energy heterogeneity is characterized using three levels of energy in sensor nodes. HFECS gathers local sensory data from sensor nodes and utilizes multi-attribute decision modeling and the entropy weight coefficient method for cluster formation and the cluster head election procedure. After cluster formation, HFECS uses the same techniques for performing data fusion at the first hierarchical level to reduce the redundant information flow from the first-second hierarchical levels, which can lead to an improvement in energy consumption, better utilization of bandwidth and extension of network lifetime. Our simulation results reveal that HFECS outperforms the existing benchmark schemes of heterogeneous clustering for larger network sizes in terms of half-life period, stability period, average residual energy, network lifetime, and packet delivery ratio.
Junaid Anees; Hao-Chun Zhang; Sobia Baig; Bachirou Guene Lougou; Thomas Gasim Robert Bona. Hesitant Fuzzy Entropy-Based Opportunistic Clustering and Data Fusion Algorithm for Heterogeneous Wireless Sensor Networks. Sensors 2020, 20, 913 .
AMA StyleJunaid Anees, Hao-Chun Zhang, Sobia Baig, Bachirou Guene Lougou, Thomas Gasim Robert Bona. Hesitant Fuzzy Entropy-Based Opportunistic Clustering and Data Fusion Algorithm for Heterogeneous Wireless Sensor Networks. Sensors. 2020; 20 (3):913.
Chicago/Turabian StyleJunaid Anees; Hao-Chun Zhang; Sobia Baig; Bachirou Guene Lougou; Thomas Gasim Robert Bona. 2020. "Hesitant Fuzzy Entropy-Based Opportunistic Clustering and Data Fusion Algorithm for Heterogeneous Wireless Sensor Networks." Sensors 20, no. 3: 913.
The gradual increase in the maturity of sensor electronics has resulted in the increasing demand for wireless sensor networks for many industrial applications. One of the industrial platforms for efficient usage and deployment of sensor networks is smart grids. The critical network traffic in smart grids includes both delay-sensitive and delay-tolerant data for real-time and non-real-time usage. To facilitate these traffic requirements, the asynchronous working–sleeping cycle of sensor nodes can be used as an opportunity to create a node connection. Efficient use of wireless sensor network in smart grids depends on various parameters like working–sleeping cycle, energy consumption, network lifetime, routing protocol, and delay constraints. In this paper, we propose an energy-efficient multi-disjoint path opportunistic node connection routing protocol (abbreviated as EMOR) for sensor nodes deployed in neighborhood area network. EMOR utilizes residual energy, availability of sensor node’s buffer size, working–sleeping cycle of the sensor node and link quality factor to calculate optimum path connectivity after opportunistic connection random graph and spanning tree formation. The multi-disjoint path selection in EMOR based on service differentiation of real-time and non-real-time traffic leads to an improvement in packet delivery rate, network lifetime, end-end delay and total energy consumption.
Junaid Anees; Hao-Chun Zhang; Sobia Baig; Bachirou Guene Lougou; Baig. Energy-Efficient Multi-Disjoint Path Opportunistic Node Connection Routing Protocol in Wireless Sensor Networks for Smart Grids. Sensors 2019, 19, 3789 .
AMA StyleJunaid Anees, Hao-Chun Zhang, Sobia Baig, Bachirou Guene Lougou, Baig. Energy-Efficient Multi-Disjoint Path Opportunistic Node Connection Routing Protocol in Wireless Sensor Networks for Smart Grids. Sensors. 2019; 19 (17):3789.
Chicago/Turabian StyleJunaid Anees; Hao-Chun Zhang; Sobia Baig; Bachirou Guene Lougou; Baig. 2019. "Energy-Efficient Multi-Disjoint Path Opportunistic Node Connection Routing Protocol in Wireless Sensor Networks for Smart Grids." Sensors 19, no. 17: 3789.
Muhammad Ahmad; Asim Ali Khan; Muhammad Amin; Hafiz M. Asif; Sobia Baig. Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights. International Journal of Communication Systems 2019, 32, e4075 .
AMA StyleMuhammad Ahmad, Asim Ali Khan, Muhammad Amin, Hafiz M. Asif, Sobia Baig. Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights. International Journal of Communication Systems. 2019; 32 (14):e4075.
Chicago/Turabian StyleMuhammad Ahmad; Asim Ali Khan; Muhammad Amin; Hafiz M. Asif; Sobia Baig. 2019. "Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights." International Journal of Communication Systems 32, no. 14: e4075.
In this paper, a novel and efficient framework for the deeply integrated power line communication (PLC) and visible light communication (VLC) system is investigated with special emphasis on the preliminary results demonstrating its feasibility in smart grids. An emerging multiple access (MA) technique Non Orthogonal Multiple Access (NOMA) is discussed and proposed for the integrated system. Analytically, it is demonstrated that NOMA provides better performance over the Orthogonal Multiple Access (OMA) schemes in terms of system capacity and power efficiency. Different integration schemes are described for PLC and VLC channels in smart grids. For the comparison among different integration schemes, the key parameters are resilience to noise and interference characterization, highly-efficient signal structure, and overall improved performance at reasonable implementation cost.
Ayesha Naz; Sobia Baig; Hafiz M. Asif. Non Orthogonal Multiple Access (NOMA) for broadband communication in smart grids using VLC and PLC. Optik 2019, 188, 162 -171.
AMA StyleAyesha Naz, Sobia Baig, Hafiz M. Asif. Non Orthogonal Multiple Access (NOMA) for broadband communication in smart grids using VLC and PLC. Optik. 2019; 188 ():162-171.
Chicago/Turabian StyleAyesha Naz; Sobia Baig; Hafiz M. Asif. 2019. "Non Orthogonal Multiple Access (NOMA) for broadband communication in smart grids using VLC and PLC." Optik 188, no. : 162-171.
Sobia Baig; Usman Ali; Hafiz M. Asif; Asim Ali Khan; Shahid Mumtaz. Closed-Form BER Expression for Fourier and Wavelet Transform-Based Pulse-Shaped Data in Downlink NOMA. IEEE Communications Letters 2019, 23, 592 -595.
AMA StyleSobia Baig, Usman Ali, Hafiz M. Asif, Asim Ali Khan, Shahid Mumtaz. Closed-Form BER Expression for Fourier and Wavelet Transform-Based Pulse-Shaped Data in Downlink NOMA. IEEE Communications Letters. 2019; 23 (4):592-595.
Chicago/Turabian StyleSobia Baig; Usman Ali; Hafiz M. Asif; Asim Ali Khan; Shahid Mumtaz. 2019. "Closed-Form BER Expression for Fourier and Wavelet Transform-Based Pulse-Shaped Data in Downlink NOMA." IEEE Communications Letters 23, no. 4: 592-595.
Non-orthogonal multiple access (NOMA) is considered as a prominent multiple access technique for fifth generation (5G) systems mainly because of its high spectral efficiency (SE). NOMA based system employs superposition coding (SC) and successive interference cancellation (SIC) at the transmitter and receiver side respectively. Classical multi-carrier NOMA adopts orthogonal frequency division multiplexing (OFDM) as a multi-carrier modulation (MCM) technique; however, high peak to average power ratio (PAPR) and cyclic prefix (CP) inclusion makes OFDM an inadequate choice for NOMA. To improve SE of the OFDM-NOMA, wavelet transform (WT) has been proposed for NOMA. This article proposes new physical layer techniques based on OFDM-NOMA and Wavelet OFDM (WOFDM) -NOMA for tactile internet and investigates their performance in the presence of Gaussian and non-Gaussian channels. Overlap frequency domain equalization (OFDE) is proposed as a robust equalization technique to improve the performance of SIC in the presence of Gaussian and non-Gaussian channels for OFDM-NOMA and WOFDM-NOMA. Moreover, to enhance the equalization efficiency of the OFDE, linear precoding (LP) in the form of Walsh Hadamard transform (WHT) is also recommended for OFDM and WOFDM based NOMA transceivers which improves the reliability of the network. Performance of the proposed precoded OFDM-NOMA and precoded WOFDM-NOMA with OFDE is analyzed in the presence of additive white Gaussian noise (AWGN) and impulse noise for Rayleigh fading channel. Link level performance of the presented structures for downlink NOMA is evaluated in terms of bit error rate (BER), PAPR, SE and computational complexity (CC). Furthermore, performance of the proposed architectures is also compared in the presence of impulse noise having different intensities. Simulation results via computer show that the proposed precoded WOFDM-NOMA with OFDE transceiver incorporates low latency through waveform shaping and enhanced reliability through precoding and efficient equalization. Thus, proposed advanced physical layer not only performs better than its counterparts but presence of OFDE enhances SIC performance even in the presence of impulse noise at the expense of slight elevation in CC.
Arsla Khan; Saud Khan; Sobia Baig; Hafiz Muhammad Asif; Soo Young Shin. Wavelet OFDM with Overlap FDE for non-Gaussian channels in precoded NOMA based systems. Future Generation Computer Systems 2019, 97, 165 -179.
AMA StyleArsla Khan, Saud Khan, Sobia Baig, Hafiz Muhammad Asif, Soo Young Shin. Wavelet OFDM with Overlap FDE for non-Gaussian channels in precoded NOMA based systems. Future Generation Computer Systems. 2019; 97 ():165-179.
Chicago/Turabian StyleArsla Khan; Saud Khan; Sobia Baig; Hafiz Muhammad Asif; Soo Young Shin. 2019. "Wavelet OFDM with Overlap FDE for non-Gaussian channels in precoded NOMA based systems." Future Generation Computer Systems 97, no. : 165-179.
Zanib Tahira; Hafiz M. Asif; Asim Ali Khan; Sobia Baig; Shahid Mumtaz; Saba Al-Rubaye. Optimization of Non-Orthogonal Multiple Access Based Visible Light Communication Systems. IEEE Communications Letters 2019, 23, 1365 -1368.
AMA StyleZanib Tahira, Hafiz M. Asif, Asim Ali Khan, Sobia Baig, Shahid Mumtaz, Saba Al-Rubaye. Optimization of Non-Orthogonal Multiple Access Based Visible Light Communication Systems. IEEE Communications Letters. 2019; 23 (8):1365-1368.
Chicago/Turabian StyleZanib Tahira; Hafiz M. Asif; Asim Ali Khan; Sobia Baig; Shahid Mumtaz; Saba Al-Rubaye. 2019. "Optimization of Non-Orthogonal Multiple Access Based Visible Light Communication Systems." IEEE Communications Letters 23, no. 8: 1365-1368.
The hybrid power line communication (PLC) and visible light communication (VLC) systems can be effectively utilized for the efficient design of 5G communication setup. However, each of these integrated communication media is not primarily meant for the specific purpose of data communication, as PLC and VLC have historically served to transfer electrical energy transfer and light, respectively. With the advent of high flickering rate light emitting diodes and efficient multiplexing/modulation schemes, both technologies are observed as potential data communication carriers. Therefore, this paper presents a novel approach for modifying the modulation technique in accordance with the channel requirements of a hybrid PLC-VLC-based 5G communication systems. We provide a thorough analysis of the research work done to co-use these two technologies for data communication, suggest some exciting applications of integrated PLC-VLC systems and propose discrete wavelet transform (DWT)-based orthogonal frequency division multiplexing (OFDM) to tune the physical parameters as per the hybrid channel characteristics. Theoretical and simulation bit-error-rate results exhibit that DWT-OFDM outperforms an OFDM-based PLC-VLC system. The proposed hybrid system can be used to design smart buildings where indoor/intra-building connectivity is maintained by VLC whereas inter-building networking based on PLC communication.
Sobia Baig; Hafiz Muhammad Asif; Tariq Umer; Rao Shahid Mumtaz; Muhammad Shafiq; Jin-Ghoo Choi. High Data Rate Discrete Wavelet Transform-Based PLC-VLC Design for 5G Communication Systems. IEEE Access 2018, 6, 52490 -52499.
AMA StyleSobia Baig, Hafiz Muhammad Asif, Tariq Umer, Rao Shahid Mumtaz, Muhammad Shafiq, Jin-Ghoo Choi. High Data Rate Discrete Wavelet Transform-Based PLC-VLC Design for 5G Communication Systems. IEEE Access. 2018; 6 ():52490-52499.
Chicago/Turabian StyleSobia Baig; Hafiz Muhammad Asif; Tariq Umer; Rao Shahid Mumtaz; Muhammad Shafiq; Jin-Ghoo Choi. 2018. "High Data Rate Discrete Wavelet Transform-Based PLC-VLC Design for 5G Communication Systems." IEEE Access 6, no. : 52490-52499.
Qaisar Bashir; Muhammad Naeem Shehzad; Muhammad Naeem Awais; Sobia Baig; Muhammad Ghaffar Dogar; Aamir Rashid. An online temperature-aware scheduling technique to avoid thermal emergencies in multiprocessor systems. Computers & Electrical Engineering 2018, 70, 83 -98.
AMA StyleQaisar Bashir, Muhammad Naeem Shehzad, Muhammad Naeem Awais, Sobia Baig, Muhammad Ghaffar Dogar, Aamir Rashid. An online temperature-aware scheduling technique to avoid thermal emergencies in multiprocessor systems. Computers & Electrical Engineering. 2018; 70 ():83-98.
Chicago/Turabian StyleQaisar Bashir; Muhammad Naeem Shehzad; Muhammad Naeem Awais; Sobia Baig; Muhammad Ghaffar Dogar; Aamir Rashid. 2018. "An online temperature-aware scheduling technique to avoid thermal emergencies in multiprocessor systems." Computers & Electrical Engineering 70, no. : 83-98.
Visible light communication (VLC) is the branch of optical wireless communications that uses light‐emitting diodes for the dual purpose of illumination and very‐high‐speed data communication. The main motivation behind the current work is finding alternatives to the saturated radio frequency spectrum, radio frequency security issue, and vulnerability to interferences. The current work is aimed at developing a module for the physical layer of a VLC‐based ad hoc network in network simulation 3. The VLC physical layer module is developed by using the optical signal modules available in the network simulator. The work also includes modelling of VLC‐based transmitter, wireless optical channel, and the optical receiver. Furthermore, the implementation and evaluation of the VLC‐based physical layer is carried out over a typical ad hoc network under different performance metrics. The designed ad hoc network is also tested under Wi‐Fi module followed by its comparison with corresponding ad hoc network under VLC module. The comparison is based on bit error rate curves, system throughput, and gain in received signal‐to‐noise ratio mainly. Finally, the suitability of different modulation schemes is also investigated in the current work for both Wi‐Fi– and VLC‐based ad hoc networks.
Saad M. Sheikh; Hamza R. Ali; Hafiz M. Asif; Sobia Baig; Asim A. Khan. Design of NS3 VLC module and performance analysis of ad hoc network under VLC and Wi-Fi layers. International Journal of Communication Systems 2018, 31, e3764 .
AMA StyleSaad M. Sheikh, Hamza R. Ali, Hafiz M. Asif, Sobia Baig, Asim A. Khan. Design of NS3 VLC module and performance analysis of ad hoc network under VLC and Wi-Fi layers. International Journal of Communication Systems. 2018; 31 (14):e3764.
Chicago/Turabian StyleSaad M. Sheikh; Hamza R. Ali; Hafiz M. Asif; Sobia Baig; Asim A. Khan. 2018. "Design of NS3 VLC module and performance analysis of ad hoc network under VLC and Wi-Fi layers." International Journal of Communication Systems 31, no. 14: e3764.
Non-orthogonal multiple access (NOMA) is a promising multiple access technique, proposed in literature for the fifth generation (5G) mobile networks. The NOMA system model consists of the conventional orthogonal frequency division multiplexing (OFDM), as a pulse shaping technique in conjunction with a variable power domain for various users, allocated in proportion to each user’s channel gain. OFDM technique based on wavelet filter banks, namely Wavelet OFDM (WOFDM) has been utilized in digital communication to improve the system robustness to noise and adjacent channel interference, and is therefore anticipated to be adopted for the NOMA technique. WOFDM in NOMA (WNOMA) outperforms OFDM based conventional NOMA (CNOMA) with reference to interference mitigation, bandwidth efficiency, spectral confinement and multi-user capacity. Most of the fourth generation (4G) networks are based on OFDM and its variants. Therefore, in this research work, keeping in view the interoperability with the fourth generation networks and the latency requirements in 5G, a dual physical layer based on conventional OFDM and WOFDM as pulse shaping methods, is proposed for the NOMA transceiver. Performance of WNOMA and CNOMA is analyzed for bit error rate in the presence of channel impairments including additive noise and IQ imbalance and multiuser capacity is also computed. Comparison of various parameters indicates the advantage of adopting WNOMA over its conventional counterpart for relatively poor channel conditions.
Sobia Baig; Muneeb Ahmad; Hafiz Muhammad Asif; Muhammad Naeem Shehzad; Mujtaba Hussain Jaffery. Dual PHY Layer for Non-Orthogonal Multiple Access Transceiver in 5G Networks. IEEE Access 2017, 6, 3130 -3139.
AMA StyleSobia Baig, Muneeb Ahmad, Hafiz Muhammad Asif, Muhammad Naeem Shehzad, Mujtaba Hussain Jaffery. Dual PHY Layer for Non-Orthogonal Multiple Access Transceiver in 5G Networks. IEEE Access. 2017; 6 (99):3130-3139.
Chicago/Turabian StyleSobia Baig; Muneeb Ahmad; Hafiz Muhammad Asif; Muhammad Naeem Shehzad; Mujtaba Hussain Jaffery. 2017. "Dual PHY Layer for Non-Orthogonal Multiple Access Transceiver in 5G Networks." IEEE Access 6, no. 99: 3130-3139.
This article proposes a new transceiver design for Single carrier frequency division multiple access (SCFDMA) system based on discrete wavelet transform (DWT). SCFDMA offers almost same structure as Orthogonal frequency division multiple access (OFDMA) with extra advantage of low Peak to Average Power Ratio (PAPR). Moreover, this article also suggests the application of Walsh Hadamard transform (WHT) for linear precoding (LP) to improve the PAPR performance of the system. Supremacy of the proposed transceiver over conventional Fast Fourier transform (FFT) based SCFDMA is shown through simulated results in terms of PAPR, spectral efficiency (SE) and bit error rate (BER).
Arsla Khan; Amna Arif; Tabassum Nawaz; Sobia Baig. Walsh Hadamard transform based transceiver design for SC-FDMA with discrete wavelet transform. China Communications 2017, 14, 193 -206.
AMA StyleArsla Khan, Amna Arif, Tabassum Nawaz, Sobia Baig. Walsh Hadamard transform based transceiver design for SC-FDMA with discrete wavelet transform. China Communications. 2017; 14 (5):193-206.
Chicago/Turabian StyleArsla Khan; Amna Arif; Tabassum Nawaz; Sobia Baig. 2017. "Walsh Hadamard transform based transceiver design for SC-FDMA with discrete wavelet transform." China Communications 14, no. 5: 193-206.
Modeling and Characterization of Low Voltage Access Network for Narrowband Powerline Communications Advanced metering infrastructure;NB-PLC;Capacitive coupler; Nowadays, Power Line Communication (PLC) is gaining high attention from industry and electric supply companies for the services like demand response, demand side management and Advanced Metering Infrastructure (AMI). The reliable services to consumers using PLC can be provided by utilizing an efficient PLC channel for which sophisticated channel modeling is very important. This paper presents characterization of a Low Voltage (LV) access network for Narrowband Power Line Communications (NB-PLC) using transmission line (TL) theory and a Simulink model. The TL theory analysis not only includes the constant parameters but frequency selectivity is also introduced in these parameters such as resistance, conductance and impedances. However, the proposed Simulink channel model offers an analysis and characterization of capacitive coupler, network impedance and channel transfer function for NB-PLC. Analysis of analytical and simulated results shows a close agreement of the channel transfer function. In the absence of a standardized NBPLC channel model, this research work can prove significant in improving the efficiency and accuracy of NB-PLC communication transceivers for Smart Grid communications.
Bilal Masood; Arsalan Haider; Sobia Baig. Modeling and Characterization of Low Voltage Access Network for Narrowband Powerline Communications. Journal of Electrical Engineering & Technology 2017, 12, 443 -450.
AMA StyleBilal Masood, Arsalan Haider, Sobia Baig. Modeling and Characterization of Low Voltage Access Network for Narrowband Powerline Communications. Journal of Electrical Engineering & Technology. 2017; 12 (1):443-450.
Chicago/Turabian StyleBilal Masood; Arsalan Haider; Sobia Baig. 2017. "Modeling and Characterization of Low Voltage Access Network for Narrowband Powerline Communications." Journal of Electrical Engineering & Technology 12, no. 1: 443-450.