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针对两单播多跳网络,在存在两个中继端的情况下,研究源端的干扰对齐预编码设计、中继的干扰消除解码和预编码转发设计,以及目的端的干扰消除解码处理.对干扰对齐和解码需满足的约束条件进行分析,给出简化的网络干扰对齐的可行条件.此外,对源端与中继端的功率分配进行优化.最后对干扰对齐的可行性、功率分配的性能进行仿真测试.表明在满足网络对齐约束条件后,干扰对齐可行,并且采用简化迭代注水功率分配算法较采用平均功率分配算法的系统容量有明显提高.
In the case of two unicast and multi-hop networks, the interference pre-coding design at the source end, the interference cancellation decoding and pre-coding forwarding design at the relay end, and the interference cancellation decoding at the destination end are studied under the condition that there are two relay terminals. And decoding constraints to be analyzed to give a simplified feasible conditions for network interference alignment.In addition, the power distribution at the source and the relay is optimized.Finally, the feasibility of interference alignment and the performance of power allocation are simulated It shows that the interference alignment is feasible when the network alignment constraints are satisfied, and the system capacity using the simplified iterative waterflooding power allocation algorithm is significantly improved compared with the average power allocation algorithm.