Design and analysis of LDPC codes for joint source‐channel decoding of two correlated sensors

Khas, Mohamad; Saeedi, Hamid; Asvadi, Reza

doi:10.1049/iet-com.2017.1084

Cited by 4 publications

(2 citation statements)

References 32 publications

(52 reference statements)

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“…JSCD approaches were proposed for accelerating both the Maximum A Posteriori (MAP) sequence decoding and the soft output Max-Log-MAP decoding when the Markov sources satisfied Monge property. Two correlated sensor data encoded by systematic LDPCs independently were considered in [28]. A JSCD decoder composed of two LDPC decoders was proposed, where the encoded bits at the output of each LDPC decoder were used as the a priori information at the other decoder.…”

Section: Related Work 21 General Jscd Jscc and Cross-layer Schemesmentioning

confidence: 99%

Joint Source-Channel Decoding of Polar Codes for HEVC-Based Video Streaming

Lin

Zhang

et al. 2022

ACM Trans. Multimedia Comput. Commun. Appl.

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Ultra High-Definition (UHD) and Virtual Reality (VR) video streaming over 5G networks are emerging, in which High-Efficiency Video Coding (HEVC) is used as source coding to compress videos more efficiently and polar code is used as channel coding to transmit bitstream reliably over an error-prone channel. In this article, a novel Joint Source-Channel Decoding (JSCD) of polar codes for HEVC-based video streaming is presented to improve the streaming reliability and visual quality. Firstly, a Kernel Density Estimation (KDE) fitting approach is proposed to estimate the positions of error channel decoded bits. Secondly, a modified polar decoder called R-SCFlip is designed to improve the channel decoding accuracy. Finally, to combine the KDE estimator and the R-SCFlip decoder together, the JSCD scheme is implemented in an iterative process. Extensive experimental results reveal that, compared to the conventional methods without JSCD, the error data-frame correction ratios are increased. Averagely, 1.07% and 1.11% Frame Error Ratio (FER) improvements have been achieved for Additive White Gaussian Noise (AWGN) and Rayleigh fading channels, respectively. Meanwhile, the qualities of the recovered videos are significantly improved. For the 2D videos, the average Peak Signal-to-Noise Ratio (PSNR) and Structural SIMilarity (SSIM) gains reach 14% and 34%, respectively. For the 360֯ videos, the average improvements in terms of Weighted-to-Spherically-uniform PSNR (WS-PSNR) and Voronoi-based Video Multimethod Assessment Fusion (VI-VMAF) reach 21% and 7%, respectively.

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Section: Related Work 21 General Jscd Jscc and Cross-layer Schemesmentioning

confidence: 99%

Joint Source-Channel Decoding of Polar Codes for HEVC-Based Video Streaming

Lin

Zhang

et al. 2022

ACM Trans. Multimedia Comput. Commun. Appl.

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“…In error correction coding, non-binary LDPC codes are the best ones currently used for error correction capability, low coding complexity and high decoding efficiency and are very suitable for use in WSN [ 5 , 6 , 7 , 8 ]. The research shows that the non-binary LDPC code using the belief propagation (BP) algorithm has excellent performance approaching the Shannon limit.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Non-Binary LDPC-CPM System for Hybrid Check Matrix Construction Algorithm of WSN

Meng

Zhao

Zhang

2018

Sensors

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In order to enhance the reliability and anti-interference performance of wireless sensor network (WSN) data transmission, this paper designs the low power scheme of the WSN from the angle of error correction coding and proposes the hybrid check matrix construction (HC) algorithm based on iterative coding algorithms with linear coding complexity. The algorithm first improves the traditional iterative coding algorithm, making it suitable for non-binary low-density parity check (LDPC) codes. Then, the algorithm applies the backward iteration method to change the coding scheme and uses the check matrix construction method so that the progressive edge growth (PEG) algorithm has a lower triangular structure, which is used as a base matrix. An improved quasi-cyclic LDPC (QC-LDPC) algorithm, with a lower triangular structure, is used to generate a cyclic shift matrix and a finite domain coefficient matrix. Simultaneously, the short loop is eliminated and the optimal check matrix is selected for use in the channel coding process. The non-binary LDPC-CPM system is modeled and simulated. The simulation results show that the non-binary LDPC code constructed by the HC algorithm not only has linear coding and storage complexity but also has strong error correction capability. The design of non-binary LDPC-CPM system parameters can enhance the reliability, anti-jamming capability and reduce the complexity and reduce the complexity of the WSN.

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