Joint iterative decoding for LDPC-coded multi-relay cooperation with receive multi-antenna in the destination

2013 ◽  
Vol 7 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Lei Tang ◽  
Hongjun Xu ◽  
Fengfan Yang ◽  
Shunwai Zhang
Keyword(s):  
Iterative Decoding ◽  
Relay Cooperation ◽  
Joint Iterative Decoding

scholarly journals A Deterministic Construction for Jointly Designed Quasicyclic LDPC Coded-Relay Cooperation

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Muhammad Asif ◽  
Wuyang Zhou ◽  
Qingping Yu ◽  
Xingwang Li ◽  
Nauman Ali Khan
Keyword(s):  
Fading Channels ◽  
Iterative Decoding ◽  
Rayleigh Fading ◽  
Additive White Gaussian Noise ◽  
Ldpc Codes ◽  
Destination Node ◽  
Relay Nodes ◽  
Binary Matrix ◽  
Relay Cooperation ◽  
Joint Iterative Decoding

This correspondence presents a jointly designed quasicyclic (QC) low-density parity-check (LDPC) coded-relay cooperation with joint-iterative decoding in the destination node. Firstly, a design-theoretic construction of QC-LDPC codes based on a combinatoric design approach known as optical orthogonal codes (OOC) is presented. Proposed OOC-based construction gives three classes of binary QC-LDPC codes with no length-4 cycles by utilizing some known ingredients including binary matrix dispersion of elements of finite field, incidence matrices, and circulant decomposition. Secondly, the proposed OOC-based construction gives an effective method to jointly design length-4 cycles free QC-LDPC codes for coded-relay cooperation, where sum-product algorithm- (SPA-) based joint-iterative decoding is used to decode the corrupted sequences coming from the source or relay nodes in different time frames over constituent Rayleigh fading channels. Based on the theoretical analysis and simulation results, proposed QC-LDPC coded-relay cooperations outperform their competitors under same conditions over the Rayleigh fading channel with additive white Gaussian noise.

scholarly journals Jointly designed quasi-cyclic LDPC-coded cooperation with diversity combining at receiver

2020 ◽  
Vol 16 (7) ◽  
pp. 155014772093897
Author(s):  
Muhammad Asif ◽  
Wuyang Zhou ◽  
Qingping Yu ◽  
Saifullah Adnan ◽  
Md Sadek Ali ◽  
...  
Keyword(s):  
Iterative Decoding ◽  
Information Transfer ◽  
Additive White Gaussian Noise ◽  
Ldpc Codes ◽  
Maximal Ratio Combining ◽  
Destination Node ◽  
Code Length ◽  
Relay Nodes ◽  
Relay Cooperation ◽  
Rate Selection

This correspondence proposes a jointly-designed quasi-cyclic (QC) low-density parity-check (LDPC)-coded multi-relay cooperation with a destination node realized by multiple receive antennas. First, a deterministic approach is utilized to construct different classes of binary QC-LDPC codes with no length-4 cycles. Existing methods put some limitations in terms of code length and rate in order to provide high error-correction performance. Therefore, this article gives three classes of QC-LDPC codes based on a combinatoric design approach, known as cyclic difference packing (CDP), with flexibility in terms of code-length and rate selection. Second, the proposed CDP-based construction is utilized to jointly-design QC-LDPC codes for coded-relay cooperation. At the receiver, the destination node is realized by multiple receive antennas, where maximal-ratio combining (MRC) and sum-product algorithm (SPA)-based joint iterative decoding are utilized to decode the corrupted sequences coming from the source and relay nodes. Simulation results show that the proposed QC-LDPC coded-relay cooperations outperform their counterparts with a coding gain of about 0.25 dB at bit-error rate (BER) [Formula: see text] over a Rayleigh fading channel in the presence of additive white Gaussian noise. Furthermore, the extrinsic-information transfer (EXIT) chart analysis has been used to detect the convergence threshold of proposed jointly-designed QC-LDPC codes. Numerical analysis shows that the proposed jointly-designed QC-LDPC codes provide a better convergence as compared to their counterparts under the same conditions.

scholarly journals Joint Iterative Decoding of Trellis-Based VQ and TCM

2007 ◽  
Vol 6 (4) ◽  
pp. 1327-1336 ◽  
Author(s):  
R. Maunder ◽  
J. Kliewer ◽  
S. Ng ◽  
J. Wang ◽  
L-L. Yang ◽  
...  
Keyword(s):  
Iterative Decoding ◽  
Joint Iterative Decoding
Sign in / Sign up

Export Citation Format

Share Document