基于干扰窃听的单双跳高频谱效率传输方案研究

The Research on High Spectrum Efficiency Schemes of One and Dual-Hop Based on Interference Overhearing

针对蜂窝网单跳直达和中继协同共存的物理场景,提出了共享信道资源的多信息流同时服务的蜂窝网高频谱效率方案设计,为了解决所提方案存在的流间干扰问题,通过将窃听的干扰作为移动终端的有用信息进行处理,设计了线性的最小均方误差(MMSE)和非线性最小均方误差连续干扰消除的自适应接收机.同时,基站端采用了高信噪比的渐近最优叠加编码方案以均衡两个信息流,而中继站则通过半正定松弛方法和随机优化进行全局优化求解,借助二分法的结构化解决方法,获得有限功率约束下最大化两个信息流可达速率的最优中继波束成型矩阵.最后,通过仿真验证了所提优化方案的有效性及理论推导的正确性.

According to the practical co-existence scenario of one-hop LoS(Line-of-Sight)and relay cooperation transmission of cellular network,the high spectrum efficiency schemes of cellular network were designed with multiple stream service simultaneously for shared channel resources.In order to solve the inter-stream interference problem of the proposed schemes,the linear and non-linear minimum mean square error(MMSE)successive interference cancellation adaptive receiver was designed through addressing the received overhearing interference as the useful information.Moreover,the base station(BS)adopted the asymptotic optimal superposition coding scheme in high SNR to equalize the two information streams,whereas,the relay station(RS)obtained the global optimization solution through semi-definite relaxation method and random optimization and achieved the optimal relay beamforming matrix under the subject of two information streams sum-rate maximization with finite power constraint via dichotomy of structured solutions.Finally,simulations and analysis verified the effectiveness of the proposed schemes and the correctness of the theoretical derivations.