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提出了两跳中继通信系统线性均衡和线性预编码的联合优化算法,该算法在中继节点上把源节点与中继节点通信的检测算法和中继与目的节点通信的预编码算法结合起来,从而联合优化问题就等效成对检测和预编码矩阵的乘积进行单一优化问题.通过放松约束条件,给出了性能下限的闭式解,并且克服了迭代算法可能带来的不收敛性,与迭代算法相比较,大大降低了复杂度.通过仿真分析可以看出,该算法在性能上要好于最小均方误差算法,与最优的三节点联合优化算法相比,性能损失在可接受的范围内,能达到性能与复杂度的良好折中.
A joint optimization algorithm of linear equalization and linear precoding for two-hop relay communication system is proposed. The algorithm combines detection algorithm of relay communication between source node and relay node and precoding algorithm of relay and destination node communication , So that the joint optimization problem is equivalent to a single optimization problem between pairs of detection and precoding matrices.By relaxing the constraints, a closed-form solution of the lower performance limit is given and the possible non-convergence of the iterative algorithm is overcome, Comparing with the iterative algorithm, the complexity is greatly reduced. The simulation analysis shows that the proposed algorithm is better than the least mean square error algorithm in performance. Compared with the optimal three-node joint optimization algorithm, Range, can achieve a good compromise between performance and complexity.