低信噪比下的码速率估计算法研究  

Research on Code Rate Estimation Algorithm at Low SNR

作　　者：许斌 鲁茂昌 秦文兵 

机构地区：[1]装备学院,北京101416

出　　处：《遥测遥控》2014年第2期60-63,共4页Journal of Telemetry,Tracking and Command

摘　　要：经过理论推算与仿真得出,在二次小波变换后再进行循环累积量计算,可提高循环频率域的谱线峰值,提升算法在低信噪比下的估计精度。仿真结果表明,改进算法对码速率信息提取的信噪比要求降低了约3dB。The theoretical calculations and simulations show that the spectral peak can be improved and the code rate estimation accuracy can be increased by combining cyclic cumulants with the secondary wavelet transform. The simulation results prove that the requirement of SNR for the code rate extraction reduces about 3dB with the improved algorithm.

关 键 词：码速率估计 小波变换 循环累积量 

分 类 号：TN914[电子电信—通信与信息系统]