基于等增益合成的多天线信号盲检测算法  

Multi-antenna signal blind detection algorithm based on equal gain combining

作　　者：万英杰 胡赟鹏[1] 沈智翔[1] WAN Yingjie;HU Yunpeng;SHEN Zhixiang(Information Systems Engineering Institute,Information Engineering University,Zhengzhou Henan 450001,China)

机构地区：[1]信息工程大学信息系统工程学院,河南郑州450001

出　　处：《太赫兹科学与电子信息学报》2018年第4期709-714,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61501517)

摘　　要：在多天线信号联合检测场景中,信号存在相关性和噪声方差无法准确确定问题会同时发生,导致经典的多天线能量检测算法性能不理想。为此,提出一种基于多天线信号等增益合成的信号盲检测算法。该算法通过多天线合成技术,补偿各路天线接收信号的差异性,然后进行等增益合成,并取合成信号能量与单路天线信号的能量比值作为检测统计量,利用统计理论推导出相应的检测门限和检测概率。仿真结果表明,新算法能够摆脱噪声的不确定性影响,且比现有盲检测算法具有更优的检测性能。In the multi-antenna signal detection scenarios, there will be both the noise uncertainty and the correlation between the signal samples. Therefore, the performance of traditional multi-antenna energy detection algorithm is poor. A blind signal detection algorithm based on equal gain combination of multi- antenna signals is proposed. The algorithm utilizes the technology of multi-antenna signal combination to compensate the differences among the signals received by different antennas, and then conduct the equal gain combination. The ratios between the combined signal and the single antenna signal are taken as the detection statistical values. The detection threshold and detection probability are derived by using statistical theory. Simulation results show that the proposed algorithm obtains better detection performance than the existing blind signal detection algorithm.

关 键 词：信号检测 多天线信号 能量检测 信号合成 

分 类 号：TN911.7[电子电信—通信与信息系统]