A FAST PARAMETER ESTIMATION ALGORITHM FOR POLYPHASE CODED CW SIGNALS  

作　　者：Li Hong Qin Yuliang Wang Hongqiang Li Yanpeng Li Xiang 

机构地区：[1]School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China

出　　处：《Journal of Electronics(China)》2011年第1期30-37,共8页电子科学学刊（英文版）

摘　　要：A fast parameter estimation algorithm is discussed for a polyphase coded Continuous Waveform(CW) signal in Additive White Gaussian Noise(AWGN).The proposed estimator is based on the sum of the modulus square of the ambiguity function at the different Doppler shifts.An iterative refinement stage is proposed to avoid the effect of the spurious peaks that arise when the summation length of the estimator exceeds the subcode duration.The theoretical variance of the subcode rate estimate is derived.The Monte-Carlo simulation results show that the proposed estimator is highly accurate and effective at moderate Signal-to-Noise Ratio(SNR).A fast parameter estimation algorithm is discussed for a polyphase coded Continuous Waveform （CW） signal in Additive White Gaussian Noise （AWGN）. The proposed estimator is based on the sum of the modulus square of the ambiguity function at the different Doppler shifts. An iterative refinement stage is proposed to avoid the effect of the spurious peaks that arise when the summation length of the estimator exceeds the subcode duration. The theoretical variance of the subcode rate estimate is derived. The Monte-Carlo simulation results show that the proposed estimator is highly accurate and effective at moderate Signal-to-Noise Ratio （SNR）.

关 键 词：Parameter estimation Polyphase code Subcode-rate Modulation period 

分 类 号：TN911.7[电子电信—通信与信息系统]