By jointly optimizing cooperative diversity and multiuser diversity, an optimal “source-relay” selection scheme is proposed for multi-source and multi-relay wireless cooperative networks with cochannel interference. The source node with the largest SINR is selected to broadcast signals to multiple relay nodes based on the signals received between multiple source nodes and destination nodes. The relay node then forwards the decoded source node signals to the destination node using the selective cooperative decoding and forwarding protocol, and the destination node combines the signals received by the two hops in the cooperative transmission using the maximum ratio combining (MRC). An exact expression for outage probability in Rayleigh fading environments is derived, taking into account the correlation between SINR caused by multiple cochannel interferences. Experimental results demonstrate that increasing the number of source and relay nodes can mitigate the effects of cochannel interference, reducing the outage probability and improving overall system performance while achieving diversity gain.
HUANG Haiyan, SHI Yujie, ZHANG Xuejun, WANG Chunli, LI Xinying
. Outage Probability of Multiuser Cooperative Wireless Networks with Cochannel Interferers[J]. Journal of Applied Sciences, 2023
, 41(4)
: 636
-645
.
DOI: 10.3969/j.issn.0255-8297.2023.04.008
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