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对于多节点的协同网络,机会编码协同总是选择最佳中继参与协同,能够取得优越的中断概率性能。为了进一步提高中断概率性能,提出了基于冗余前置的机会编码协同中继策略,并对其在瑞利平坦慢衰落信道条件下的中断概率性能进行了计算机仿真。结果表明,所提策略的中断概率性能明显优于机会编码协同中继策略,若所要求的中断概率为10-3,当潜在协同中继数目为7,协同等级为0.5,目标信息速率为1 bit/s/Hz的条件下,所提策略较机会编码协同中继策略可以获得1.9 dB的信噪比增益。
For multi-node cooperative networks, opportunistic coding cooperation always selects the best relay to participate in coordination and can obtain superior performance of the interrupt probability. In order to further improve the performance of interrupt probability, this paper proposes an opportunistic coding cooperative relay strategy based on redundancy preamble, and simulates its interrupt probability performance under Rayleigh flat fading channel conditions. The results show that the outage probability of the proposed strategy is obviously better than that of the opportunistic code cooperation relaying strategy. If the required interrupt probability is 10-3, the number of potential cooperative relays is 7, the cooperation level is 0.5 and the target information rate is 1 bit / s / Hz, the proposed strategy achieves a signal-to-noise ratio gain of 1.9 dB over the opportunistic coding cooperative cooperative relay strategy.