基于分集接收技术和ALRT算法的MQAM信号识别  

MQAM signal recognition based on diversity reception technology and ALRT algorithm

作　　者：王明绪[1] 朱西方[1] 黄国庆[2] 张成根[3] Wang Mingxu Zhu Xifang Huang Guoqing Zhang Chenggen(Henan Polytechnic Institute, Nangyang 473000, China Air Force First Aviation College, Xinyang 464000, Chin Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]河南工业职业技术学院,南阳473000 [2]空军第一航空学院,信阳464000 [3]郑州大学,郑州450000

出　　处：《电子测量技术》2017年第9期155-158,共4页Electronic Measurement Technology

基　　金：河南省教育厅科学技术研究重点项目(14B510003)资助

摘　　要：航空通信中多进制正交振幅调制(MQAM)信号的调制阶数较大时,主要选用平均似然比检验(ALRT)算法来完成信号的识别。提出了一种基于多天线分集接收技术的ALRT算法,在一定程度上改善了航空通信4种场景下MQAM信号的识别性能,通过仿真发现,滑行场景的调制识别性能改善更为明显,易受信噪比影响和信道衰落的16QAM信号的调制识别性能也大大改善,此外当信噪比超过10 dB,基于多天线分集接收的ALRT算法下MAQM信号的正确识别率基本上达到100%。The high order MQAM （multiple quadrature amplitude modulation） signals are analyzed by the ALRT （average likelihood ratio test） algorithm in aeronautical communication. It proposes a ALRT algorithm based on the receive diversity technique, and progresses the recognition performance. The simulation results show that, the recognition performance of ALRT algorithm based on the receive diversity technique is better in taxi scenario. Susceptible to signal to noise than channel and the fading of the 16QAM signal modulation recognition performance is also greatly improved, in addition, when the signal-to-noise ratio over 10 dB, based on the ALRT algorithm for multi antenna diversity reception MQAM signal the correct recognition rate basically reached 100%.

关 键 词：MQAM信号 分集接收技术 ALRT算法 航空通信 

分 类 号：TN92[电子电信—通信与信息系统]