范数有界信道误差下的部分协作中继选择算法

Regional Collaborative Relay Selection Algorithm Under Norm-Bounded Channel Error

针对全协作中继带来的发射功率消耗过大,及信道误差导致的衰减等问题,提出了基于范数有界信道误差下的部分协作中继选择算法.为了降低全协作中继系统较多的功率消耗,分析和构建了部分协作中继系统,通过求解满足通信要求下的最低功率消耗获取有关中继选择的优化算法;在部分协作中继选择的基础上引入具有高斯特性且满足范数有界约束特性的信道误差,进而更全面地描述信道存在的非确定因素;利用局部松弛与稀疏提升理论,将部分中继选择的优化算法问题由非凸问题近似为凸问题求解.仿真结果显示该算法减少了系统资源的消耗,提升了资源利用率,在复杂环境下具有更强的鲁棒性.

Aim to higher transmission power consumption of full collaborative relays and the problem of attenuation based on channel error,an original method is proposed for regional collaborative relays and relays selection based on Norm-bounded Channel Error.The regional collaborative relay networks system is analyzed and built in accordance with lowest power consumption compared with full collaborative relay,and the optimal relay selection is acquired through meeting requirement of power consumption in wireless communication.The channel error based on regional collaborative relay selection is introduced,which has characteristics of satisfying randomly Gaussian generated under bounds of norm,in order to comprehensively describe the non-deterministic factors of the channel.Then,using the theory of local relaxation and sparse lifting,convex optimization approximation solution is proposed.Simulations show that the proposed algorithm satises the predetermined service levels at relatively small excess transmission power and stronger robustness.