未知衰落信道中MPSK信号的非数据辅助载波频率估计方法  

Non-Data-aided Carrier Frequency Estimation Method for MPSK Signal in Unknown Fading Channel

作　　者：闫哲[1] 许华[2] 

机构地区：[1]北京理工大学机电工程与控制国家重点实验室,北京100081 [2]空军工程大学电讯工程学院,西安710077

出　　处：《电讯技术》2011年第10期29-30,32-34,共5页Telecommunication Engineering

摘　　要：未知衰落信道中的MPSK信号的非数据辅助载波频率估计是通信参数估计中的复杂问题,目前尚缺乏有效的针对性研究成果。针对该问题,提出采用先补偿信道影响,再去调制,然后进行非衰落信道单频信号频率估计的方法。该方法比进行频率和信道冲激响应联合估计的方法简洁和高效,而且解决了联合估计中难以有效去调制的问题。通过和非衰落信道的频率估计结果对比,表明其估计性能的下降小于3dB,能很好地满足应用需要。The non-data-aided（NDA） carrier frequency estimation of MPSK signal in unknown fading channel is a complicated problem in the field of communication parameter estimation and there is no research result for this problem at present. The method proposed in this paper is that the fading channel effects are compensated firstly and then the modulation of MPSK is removed, and finally the frequency estimation is only performed for unfading single frequency signal. This method is more simple and efficient than the method which uses joint frequency and channeI impulse response estimation, and furthermore it is much more convenient to remove modulation for MPSK signal. Comparison with the frequency estimation research of non-fading channel demonstrates that the estimation performance decreases less than 3dB and this method can satisfy most application requirements.

关 键 词：未知衰落信道 MPSK信号 频率估计 最大似然 非数据辅助 

分 类 号：TN914.3[电子电信—通信与信息系统]