高阶QAM调制制式识别及其系统实现  

High Order QAM Modulation Classification and System Realization

作　　者：胡登鹏[1] 王世练[1] 张尔扬[1] 

机构地区：[1]国防科技大学电子科学与工程学院

出　　处：《飞行器测控学报》2009年第2期56-60,共5页Journal of Spacecraft TT&C Technology

摘　　要：研究了非协作通信系统中16QAM、32QAM、64QAM三种常用高阶QAM(正交幅度调制)的调制识别问题,提出了一种基于信号四次方谱和幅度特征的联合参数高阶QAM调制识别方法,并给出了详细理论分析及计算机仿真结果。该方法运算量低,易于工程实现,其正确识别率受载波及符号率估计性能影响较小。最后,基于FPGA通用硬件平台,测试结果验证了所提算法的有效性,达到了系统设计要求。在信噪比为14 dB时,正确识别率在90%以上。This paper studies classification of 16QAM,32QAM and 64QAM for non-cooperative communication systems.A practical M-QAM recognition method devised for 16QAM,32QAM and 64QAM is proposed and it is based on the characteristics of M-QAM in four times frequency domain and signal amplitude.The method features reduced numeration,convenient implementation and minimized influence by the performance of carrier estimation and symbol rate estimation.Finally,the method is implemented on FPGA platform and debugging results show that the correct recognition ratio is higher than 90% as long as SNR is higher than 14dB.

关 键 词：M-QAM 调制识别 FPGA 

分 类 号：TN911.3[电子电信—通信与信息系统]