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Ramon Parra-Michel
Centro de Investigación y de Estudios Avanzados (CINVESTAV), Zapopan, México

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Journal article
Published: 04 May 2021 in IEEE Access
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Nowadays, there is a need for wireless communications to operate over a variety of scenarios, including high mobility multiple-input multiple-output (MIMO) applications, that bring along a challenging problem. In channels where Doppler spread and delay spread are high, complexity of coherent detectors and pilot overhead are both raised. This work proposes a non-coherent reception technique, easily scalable to any number of antennas for the MIMO case, using simple coding and decoding structures which take advantage of channel diversity addition in three domains: time, frequency and space, by using virtual trajectories along with space time block-coding. Coarse analytics on the system performance in terms of the bit error rate are computed using Chernoff Boundaries as a function of the channel diversity and the order of the differential modulation, validating the efficiency of the proposed receiver.

ACS Style

G. Ramirez-Arredondo; F. Pena-Campos; Ramon Parra-Michel; Valeri Kontorovich. Invariant Incoherent MIMO Reception Over Doubly Selective Channels. IEEE Access 2021, 9, 67776 -67785.

AMA Style

G. Ramirez-Arredondo, F. Pena-Campos, Ramon Parra-Michel, Valeri Kontorovich. Invariant Incoherent MIMO Reception Over Doubly Selective Channels. IEEE Access. 2021; 9 ():67776-67785.

Chicago/Turabian Style

G. Ramirez-Arredondo; F. Pena-Campos; Ramon Parra-Michel; Valeri Kontorovich. 2021. "Invariant Incoherent MIMO Reception Over Doubly Selective Channels." IEEE Access 9, no. : 67776-67785.

Journal article
Published: 12 February 2021 in Micromachines
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Current computing platforms encourage the integration of thousands of processing cores, and their interconnections, into a single chip. Mobile smartphones, IoT, embedded devices, desktops, and data centers use Many-Core Systems-on-Chip (SoCs) to exploit their compute power and parallelism to meet the dynamic workload requirements. Networks-on-Chip (NoCs) lead to scalable connectivity for diverse applications with distinct traffic patterns and data dependencies. However, when the system executes various applications in traditional NoCs—optimized and fixed at synthesis time—the interconnection nonconformity with the different applications’ requirements generates limitations in the performance. In the literature, NoC designs embraced the Software-Defined Networking (SDN) strategy to evolve into an adaptable interconnection solution for future chips. However, the works surveyed implement a partial Software-Defined Network-on-Chip (SDNoC) approach, leaving aside the SDN layered architecture that brings interoperability in conventional networking. This paper explores the SDNoC literature and classifies it regarding the desired SDN features that each work presents. Then, we described the challenges and opportunities detected from the literature survey. Moreover, we explain the motivation for an SDNoC approach, and we expose both SDN and SDNoC concepts and architectures. We observe that works in the literature employed an uncomplete layered SDNoC approach. This fact creates various fertile areas in the SDNoC architecture where researchers may contribute to Many-Core SoCs designs.

ACS Style

Jose Gomez-Rodriguez; Remberto Sandoval-Arechiga; Salvador Ibarra-Delgado; Viktor Rodriguez-Abdala; Jose Vazquez-Avila; Ramon Parra-Michel. A Survey of Software-Defined Networks-on-Chip: Motivations, Challenges and Opportunities. Micromachines 2021, 12, 183 .

AMA Style

Jose Gomez-Rodriguez, Remberto Sandoval-Arechiga, Salvador Ibarra-Delgado, Viktor Rodriguez-Abdala, Jose Vazquez-Avila, Ramon Parra-Michel. A Survey of Software-Defined Networks-on-Chip: Motivations, Challenges and Opportunities. Micromachines. 2021; 12 (2):183.

Chicago/Turabian Style

Jose Gomez-Rodriguez; Remberto Sandoval-Arechiga; Salvador Ibarra-Delgado; Viktor Rodriguez-Abdala; Jose Vazquez-Avila; Ramon Parra-Michel. 2021. "A Survey of Software-Defined Networks-on-Chip: Motivations, Challenges and Opportunities." Micromachines 12, no. 2: 183.

Journal article
Published: 31 December 2019 in Journal of Technology and Innovation
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Bathymetry is a method of quantifying depths to study the topography of water bodies, including oceans, seas, rivers and lakes. The measurement of bathymetry by means of satellite images is one of the fundamental investigations in the field of remote sensing (RS) of marine environment, which has a lot of applications for the coastal environment and its monitoring. The precise determination of depth water is essential for various purposes, such as the monitoring of underwater topography, the movement of deposited sediments and the production of maritime maps for navigation. Remote sensing allows the bathymetry modeling at spatial scales that are impossible to achieve with traditional methods. Bathymetry can be estimated using RS with several techniques, each with its own capacity for depth detection, accuracy, error, strengths, advantages, disadvantages and the best application environment. Before that, a GUI interface is developed in Matlab that contains enough data to be able to compute the bathymetry in multispectral images from the satellite LANDSAT 8, with the intention of being able to analyze how flooded an area will be.

ACS Style

Felipe Astudillo-Montenegro; Israel Yañez-Vargas; Josué López-Ruíz; Ramón Parra-Michel; Deni Torres-Román. Desarrollo de una interfaz para el cálculo de los niveles de profundidad en cuerpos de agua a través de batimetría (TOLTECA). Journal of Technology and Innovation 2019, 15 -21.

AMA Style

Felipe Astudillo-Montenegro, Israel Yañez-Vargas, Josué López-Ruíz, Ramón Parra-Michel, Deni Torres-Román. Desarrollo de una interfaz para el cálculo de los niveles de profundidad en cuerpos de agua a través de batimetría (TOLTECA). Journal of Technology and Innovation. 2019; ():15-21.

Chicago/Turabian Style

Felipe Astudillo-Montenegro; Israel Yañez-Vargas; Josué López-Ruíz; Ramón Parra-Michel; Deni Torres-Román. 2019. "Desarrollo de una interfaz para el cálculo de los niveles de profundidad en cuerpos de agua a través de batimetría (TOLTECA)." Journal of Technology and Innovation , no. : 15-21.

Journal article
Published: 31 December 2019 in Journal of Computational Systems and ICTs
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The software-defined radio platforms that currently exist are mainly focused on the development of software communication blocks, leaving aside the hardware development, so the need arises to have a testing platform for hardware blocks which also allows us to interact with a radio frequency stage to perform blocks tests of complete communication systems in the air such as WiFi, Bluethoot, Zig Bee among others. This article describes the design of a platform based on a Field-Programmable Gate Array (FPGA) technology and microprocessor, which allows having multiple blocks and algorithms in hardware and software and interacting between them. In the same way there is a significant number of general purpose interfaces for testing the signals, as well as having specific interfaces which allow us to interconnect with different radio frequency platforms and communication cards with the computer. This allows you to work with different radio technologies according to your needs. A use case is presented in which a Bluethoot transmitter is tested with the use of the platform.

ACS Style

Rogelio García-Dzul; Ramón Parra-Michel; Jorge Sanchez-Venegas. Design and verification of a testing platform for implementation of software defined radio communications systems. Journal of Computational Systems and ICTs 2019, 14 -19.

AMA Style

Rogelio García-Dzul, Ramón Parra-Michel, Jorge Sanchez-Venegas. Design and verification of a testing platform for implementation of software defined radio communications systems. Journal of Computational Systems and ICTs. 2019; ():14-19.

Chicago/Turabian Style

Rogelio García-Dzul; Ramón Parra-Michel; Jorge Sanchez-Venegas. 2019. "Design and verification of a testing platform for implementation of software defined radio communications systems." Journal of Computational Systems and ICTs , no. : 14-19.

Journal article
Published: 12 November 2019 in Electronics
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Maximum likelihood sequence estimation (MLSE) and maximum a posteriori probability (MAP) equalizers are optimum receivers for dealing with intersymbol interference (ISI) in time-dispersive channels. However, their high complexity and latency limit their widespread implementation; therefore, research into reducing their complexity is an open topic. This paper proposes a novel modification to reduce the computational complexity of the aforementioned algorithms, which exploits the representation of the communication channels in a time-delay-domain basis expansion model (BEM). It is shown that an appropriate basis is a set of modified prolate functions, in which the transmitter and receiver filters are considered in the kernel construction. Simulation results show that a reduction in sums and multiplications on the order of 55% can be obtained, maintaining the same bit error rate performance as in the traditional implementation.

ACS Style

Karel Charles-Darby; Roberto Carrasco-Alvarez; R. Parra-Michel. Complexity Reduction of MLSE and MAP Equalizers Using Modified Prolate Basis Expansion. Electronics 2019, 8, 1333 .

AMA Style

Karel Charles-Darby, Roberto Carrasco-Alvarez, R. Parra-Michel. Complexity Reduction of MLSE and MAP Equalizers Using Modified Prolate Basis Expansion. Electronics. 2019; 8 (11):1333.

Chicago/Turabian Style

Karel Charles-Darby; Roberto Carrasco-Alvarez; R. Parra-Michel. 2019. "Complexity Reduction of MLSE and MAP Equalizers Using Modified Prolate Basis Expansion." Electronics 8, no. 11: 1333.

Journal article
Published: 12 August 2019 in IEEE Transactions on Vehicular Technology
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High mobility and multipath propagation induce Doppler and delay dispersion, respectively. When both phenomena affect the transmitted signal, the communication channel is known as a doubly selective channel (DSC). In multicarrier systems under this scenario, intersymbol interference (ISI) and intercarrier interference (ICI) are ineluctably present, severely degrading the system's performance. Therefore, much effort has been invested in researching convenient waveforms that enable the receiver self-interference cancellation, while making use of the available space, time, and frequency diversity. In this paper, a multicarrier multiple-input multiple-output (MIMO) system for communication in DSCs is presented. By using the virtual trajectory (VT) representation of the MIMO channel, direct conversion of Doppler diversity into additional virtual antennas in the receiver is achieved. This concept is developed for a coherent system with one-tap channel estimation (CE) and equalization algorithms of low complexity as well as for incoherent detection using differential space-frequency block codes (DSFBCs), where pilot signals are not used. For both systems, runtime cancellation and/or inversion of complex interference channel matrices is avoided. Diversity of the doubly selective MIMO channel is exploited without sacrificing compatibility with current multicarrier MIMO systems. The presented system offers robustness in DSCs with minimal extra complexity when compared to conventional approaches. The results demonstrate that MIMO orthogonal frequency division modulation (MIMO-OFDM) can be still implemented in extremely high Doppler scenarios if VT reception is incorporated.

ACS Style

Fernando Pena-Campos; Ramon Parra-Michel; Valeri Kontorovich; V. Kontorovitch. MIMO Multicarrier Transmission Over Doubly Selective Channels With Virtual Trajectories Receiver. IEEE Transactions on Vehicular Technology 2019, 68, 9330 -9338.

AMA Style

Fernando Pena-Campos, Ramon Parra-Michel, Valeri Kontorovich, V. Kontorovitch. MIMO Multicarrier Transmission Over Doubly Selective Channels With Virtual Trajectories Receiver. IEEE Transactions on Vehicular Technology. 2019; 68 (10):9330-9338.

Chicago/Turabian Style

Fernando Pena-Campos; Ramon Parra-Michel; Valeri Kontorovich; V. Kontorovitch. 2019. "MIMO Multicarrier Transmission Over Doubly Selective Channels With Virtual Trajectories Receiver." IEEE Transactions on Vehicular Technology 68, no. 10: 9330-9338.

Journal article
Published: 30 June 2019 in Journal of Scientific and Technical Applications
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Turbo coding is a channel coding technique that increases the capacity of communications systems, especially wireless and mobile. Due to its high correction capability, this technique is used in modern wireless communication standards such as 3GPP and LTE/LTE-Advanced. One of the features of these systems is the increase in data processing capacity, where transmission rates of up to 1 Gbps are specified. However, the turbo coding technique inherently presents a limited performance as a consequence of the turbo decoding process at the reception stage. The turbo decoder presents a high operation latency mainly caused by the iterative decoding process, the interleaver and deinterleaver stage and the estimation process of the information bits. In this work, we show the techniques used to implement modern low-latency turbo decoders suitable for 3G and 4G standards.

ACS Style

Lennin Conrado Yllescas-Calderon; Ramón Parra-Michel; Luis F Gonzalez-Pérez. Técnicas para la implementación de turbo decodificadores con baja latencia. Journal of Scientific and Technical Applications 2019, 29 -41.

AMA Style

Lennin Conrado Yllescas-Calderon, Ramón Parra-Michel, Luis F Gonzalez-Pérez. Técnicas para la implementación de turbo decodificadores con baja latencia. Journal of Scientific and Technical Applications. 2019; ():29-41.

Chicago/Turabian Style

Lennin Conrado Yllescas-Calderon; Ramón Parra-Michel; Luis F Gonzalez-Pérez. 2019. "Técnicas para la implementación de turbo decodificadores con baja latencia." Journal of Scientific and Technical Applications , no. : 29-41.

Journal article
Published: 11 June 2018 in IEEE Transactions on Wireless Communications
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Recent communications standards, such as vehicle-to-vehicle (V2V) and fifth generation (5G), include applications where the transmitted signal encounters rapid changes of propagation scenarios, resulting in wireless links characterized as non-stationary (NS) channels. Hence, channel models that correctly explain and represent the measured timevarying channel statistics, and their associated simulation methods for testing purposes, are all required. Although the body of works devoted to NS channel modeling is vast, due to the complexity and variety of this problem, the provided NS statistics are defined only within a limited observation time, and therefore, the generated channel realizations do not include the changes between scenarios. In light of this problem, this paper introduces a channel model that mimics the continuous change of the mobile propagation channel via a continual renewal of channel parameters, in which all stationary and NS channels are represented under a unified structure. Theoretical and simulation results provided in this work confirm that the proposed model reproduces stationary models with high accuracy. In addition, NS channel realizations with predefined time-varying power spectral density (PSD) and time-varying envelope distributions are also shown in this paper, providing a means for testing modern communications systems.

ACS Style

Ramon Parra-Michel; Javier Vazquez Castillo; Luis Rene Vela-Garcia; Valeri Kontorovich; Fernando Pena-Campos. A Channel Model and Simulation Technique for Reproducing Channel Realizations With Predefined Stationary or Non-Stationary PSD. IEEE Transactions on Wireless Communications 2018, 17, 5409 -5424.

AMA Style

Ramon Parra-Michel, Javier Vazquez Castillo, Luis Rene Vela-Garcia, Valeri Kontorovich, Fernando Pena-Campos. A Channel Model and Simulation Technique for Reproducing Channel Realizations With Predefined Stationary or Non-Stationary PSD. IEEE Transactions on Wireless Communications. 2018; 17 (8):5409-5424.

Chicago/Turabian Style

Ramon Parra-Michel; Javier Vazquez Castillo; Luis Rene Vela-Garcia; Valeri Kontorovich; Fernando Pena-Campos. 2018. "A Channel Model and Simulation Technique for Reproducing Channel Realizations With Predefined Stationary or Non-Stationary PSD." IEEE Transactions on Wireless Communications 17, no. 8: 5409-5424.

Journal article
Published: 30 March 2018 in IEEE Transactions on Vehicular Technology
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Estimation of channel state information in doubly selective channels (DSC) is a demanding task. In addition, the bandwidth expended in pilot signals may considerably impact the system throughput. Furthermore, the computational resources required for estimation and equalization of the DSC may limit the implementation of practical communication systems. In this correspondence paper, a differential system with incoherent reception on DSCs is presented. The proposed approach uses a virtual trajectory representation of the received signals by means of the basis expansion modeling of the channel. This allows the receiver to convert the Doppler dispersion in virtual antennas and mitigate intercarrier interference while preserving frequency correlation. The proposed approach achieves incoherent reception of multicarrier signals with O(Nlog 2 N) complexity avoiding channel estimation in a simple autocorrelation differential phase shift keying detector.

ACS Style

Fernando Pena-Campos; Ramón Parra Michel; Valeri Kontorovitch. Incoherent DPSK Diversity Reception in Doubly Selective Channels Based on Virtual Trajectories. IEEE Transactions on Vehicular Technology 2018, 67, 7744 -7748.

AMA Style

Fernando Pena-Campos, Ramón Parra Michel, Valeri Kontorovitch. Incoherent DPSK Diversity Reception in Doubly Selective Channels Based on Virtual Trajectories. IEEE Transactions on Vehicular Technology. 2018; 67 (8):7744-7748.

Chicago/Turabian Style

Fernando Pena-Campos; Ramón Parra Michel; Valeri Kontorovitch. 2018. "Incoherent DPSK Diversity Reception in Doubly Selective Channels Based on Virtual Trajectories." IEEE Transactions on Vehicular Technology 67, no. 8: 7744-7748.

Journal article
Published: 15 June 2013 in Expert Systems with Applications
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This paper presents a high payload data-hiding scheme for audio signals following the OFDM concept. It is based on changing the phase component of the audio signal via a reduced-arc M-order Phase Shift Keying (MPSK) modulator on selected frequency samples of the audio signal. This approach allows the data-hiding payload and perceptual distortion to be controlled by the number of altered frequency components of the audio signal and the severity of this alteration. The data-hiding payload can be estimated a priori independently of the audio signal features. In addition, due to the relation of the proposed scheme with the traditional use of MPSK modulation, the BER of the encoded data is analytically derived, therefore, it is known in advance. This allows the transmission of reliable hidden data, in contrast to previous works. Results obtained with representative test cases show that the proposed algorithm provides an increase of one order of magnitude in data payload compared with state-of-the-art works.

ACS Style

Jose Juan Garcia-Hernandez; Ramon Parra-Michel; Claudia Feregrino-Uribe; Rene Cumplido. High payload data-hiding in audio signals based on a modified OFDM approach. Expert Systems with Applications 2013, 40, 3055 -3064.

AMA Style

Jose Juan Garcia-Hernandez, Ramon Parra-Michel, Claudia Feregrino-Uribe, Rene Cumplido. High payload data-hiding in audio signals based on a modified OFDM approach. Expert Systems with Applications. 2013; 40 (8):3055-3064.

Chicago/Turabian Style

Jose Juan Garcia-Hernandez; Ramon Parra-Michel; Claudia Feregrino-Uribe; Rene Cumplido. 2013. "High payload data-hiding in audio signals based on a modified OFDM approach." Expert Systems with Applications 40, no. 8: 3055-3064.

Conference paper
Published: 01 September 2006 in 2006 3rd International Conference on Electrical and Electronics Engineering
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Here we are presenting a simulator for a wireless wideband multiple-input multiple-output (MIMO) channel by considering the prolate spheroidal wave functions (PSWF) set as a universal basis for the temporal correlation properties of the separable MIMO channel using the Kronecker method

ACS Style

Alberto Alcocer-Ochoa; Valeri Ya. Kontorovitch; Ramon Parra-Michel. A Wideband MIMO Channel Simulator using the Kronecker Model. 2006 3rd International Conference on Electrical and Electronics Engineering 2006, 1 -4.

AMA Style

Alberto Alcocer-Ochoa, Valeri Ya. Kontorovitch, Ramon Parra-Michel. A Wideband MIMO Channel Simulator using the Kronecker Model. 2006 3rd International Conference on Electrical and Electronics Engineering. 2006; ():1-4.

Chicago/Turabian Style

Alberto Alcocer-Ochoa; Valeri Ya. Kontorovitch; Ramon Parra-Michel. 2006. "A Wideband MIMO Channel Simulator using the Kronecker Model." 2006 3rd International Conference on Electrical and Electronics Engineering , no. : 1-4.