A full-diversity joint network-channel code construction for cooperative communications
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Cooperative communications is a well known technique to yield transmit diversity in a multi-user environment. Network coding can increase the spectral efficiency in networks. These two techniques can be combined to achieve a double diversity order for a maximum coding rate Rc = 2/3 on the Multiple Access Relay Channel (MARC), where two sources share a common relay in their transmission to the destination. However, codes have to be carefully designed to obtain the intrinsic channel diversity. Up till now, no full-diversity capacityachieving code for the MARC at a coding rate Rc = 2/3 has been published. We present a strategy to produce excellent lowdensity parity-check (LDPC) codes with rate 2/3, i.e., exhibiting full-diversity and operating close to the outage probability limit. Simulation of the word error rate performance of the new proposed family of LDPC codes for the MARC confirms the full-diversity. 2009 IEEE.
name of conference
2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications