Diversity through coded cooperation
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Good error-correcting codes based on very sparse matrices
IEEE Transactions on Information Theory
Quasicyclic low-density parity-check codes from circulant permutation matrices
IEEE Transactions on Information Theory
LDPC block and convolutional codes based on circulant matrices
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Shortened Array Codes of Large Girth
IEEE Transactions on Information Theory
Cooperative communication in wireless networks
IEEE Communications Magazine
Low density parity check codes for the relay channel
IEEE Journal on Selected Areas in Communications
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Cooperative communication represents a new class of diversity techniques in which multiple nodes each with a single antenna cooperate to generate a virtual multiple-antenna transmission system and thus offer the benefits of spatial diversity. This paper proposes suitable array codes used as low-density parity-check (LDPC) codes to be applied in the cooperative amplify-and-forward (AF) network. A mathematical description of the construction of suitable array codes for a relay fading channel is also presented. Compared with quasi-cyclic (QC) LDPC codes, the array codes have similar encoding complexity and can adaptively generate various desired girth values. This paper shows that array codes with large girths can achieve substantial system performance improvements. Simulation results in this paper show that using array codes as LDPC codes for cooperative relay transmission provides a significant performance improvement over direct transmission. Moreover, it is also shown that its performance is superior to some structured LDPC codes such as QC-LDPC codes, particularly, a coding gain of about IdB at BER of 10-3 can be provided over its counterpart.