LDPC-Coded Cooperation with Receive Multi-Antenna and Unknown CSI in the Destination

Authors:
Shunwai Zhang;Fengfan Yang;Lei Tang;B. T. Maharaj
Affiliations:
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People's Republic of China 210016;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People's Republic of China 210016;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People's Republic of China 210016;Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Tshwane, South Africa
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

This paper studies a coded cooperation scheme with receive multi-antenna in the destination. A kind of simple-encoding irregular systematic low-density-parity-check (LDPC) codes is applied to the scheme. For Rayleigh block fading channels, in the unknown channel state information scenario, space-based adaptive least-mean square (LMS) transversal filters are adopted in the destination to realize receive diversity gain. The filtered signals from the source and relay are decoded by a joint "Min-Sum" iterative decoding algorithm. This algorithm agrees with the bilayer Tanner graph that can be used to fully characterize two distinct irregular systematic LDPC codes employed by the source and relay. Simulation results verify the effectiveness of the space-based adaptive LMS transversal filters in the coded cooperation scheme. Meanwhile, theoretical analysis and numerical simulation show that the proposed coded cooperation scheme can well combine cooperation diversity, multi-receive diversity and channel coding gains, and clearly outperforms the coded non-cooperation one under the same conditions.