AWGN信道下PSK信号幅度与信噪比的估计  

Amplitude and SNR estimate for PSK signal in AWGN channel

作　　者：潘申富[1] 李振东[1] 梁庆林[1] 

机构地区：[1]北京大学电子学系卫星与无线通信实验室,北京100871

出　　处：《通信学报》2004年第3期167-173,共7页Journal on Communications

摘　　要：研究了AWGN信道下PSK信号幅度和信噪比的估计问题,提出了一种基于迭代的直接判决反馈估计算法,并对其性能进行了分析和仿真。仿真结果表明:低信噪比下经过多次迭代后,由于误码导致的估计偏差可得到较大程度的补偿,估计器的性能接近有数据辅助时的性能,明显优于直接判决反馈时的性能。Amplitude and signal-to-noise-ratio(SNR) estimate for PSK signal in AWGN channel is discussed in this paper. A decision directed feedback iterative estimation algorithm is proposed, with the emphasis on its performance analysis and simulation. The simulation results show that after several times of iterative, the estimation bias caused by symbol error at low SNR can be greatly compensated, and as a result, the bias and variance is very close to that in data-aided mode and obviously outperforms that in decision directed feedback mode.

关 键 词：数据辅助 参数估计 直接判决反馈 迭代 

分 类 号：TN914.27[电子电信—通信与信息系统]