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采用机会,给出了在译码转发方式下基于网络编码的双向多中继系统平均中断概率表达式,通过Monte Carlo仿真,验证了理论分析的正确性。随后分析了功率分配因子与信噪比和中继节点个数在不同情形下的系统中断性能,指出了功率分配因子与系统总功率和中继节点的内在关系。仿真结果表明,在双向多中继系统中采用网络编码和机会中继时,功率分配因子取值在0.6或0.6附近时能够获得最优的系统中断性能。
Taking the opportunity, the average interrupting probability expression of bidirectional multi-relay system based on network coding in decoding and forwarding mode is given. The correctness of the theoretical analysis is verified by Monte Carlo simulation. Then, we analyze the system interruption performance of power distribution factor, signal-to-noise ratio and number of relay nodes in different situations, and point out the inherent relationship between power distribution factor and system total power and relay node. The simulation results show that when using network coding and opportunistic relay in the bidirectional multi-relay system, the optimal system interrupt performance can be obtained when the power allocation factor is around 0.6 or 0.6.