正交中继信道的信道容量及资源分配

Capacity of Orthogonal Relay Channel and Resource Allocation

本文研究了一种正交中继信道的信道容量及资源分配问题.其中,源节点到中继节点之间的信道与源节点和中继节点到目的节点之间的信道在时间上相互正交.论文首先求出了系统的信道容量上界及下界,且中继策略为部分译码-转发时,上界和下界相等,从而给出了信道容量.对于高斯正交中继信道,为了最大化信道容量,论文还研究了各种系统资源的优化问题,包括时间、功率等.仿真结果表明,仅对信道的时间分配参数进行优化与优化所有的参数相比,信道容量损失很小,且给出了此时最优时间分配的解析解.

We consider an orthogonal relay channel,where the channel from the source to the relay and the channel from the source and the relay to the destination are orthogonal on time.Firstly,the upper bound and the lower bound of the capacity are proposed,and converge to the capacity,where the lower bound is based on partial decode-and-forward.Secondly,to maximize the capacity for Gaussian orthogonal relay channel,the resource allocation is studied.The simulations show that optimizing the time only brings very little loss about capacity compared to maximize all the possible parameters.The optimal time allocation is given analytically when optimizing the time only.