Low Complexity Method for Recovering Continuous Phase Modulation Signals with Low Signal-to-noise Ratios

被引：0
作者：
Su, Y. [1 ]
Zhao, J. [1 ]
Wang, Z. [1 ]
Xu, W. [2 ]
Sun, G. [1 ]
机构：
[1] Nankai Univ, Coll Elect Informat & Opt Engn, Tianjin 300350, Peoples R China
[2] Tianjin Polytech Univ, Sch Elect & Informat Engn, Tianjin 300072, Peoples R China
来源：
JOURNAL OF COMMUNICATIONS TECHNOLOGY AND ELECTRONICS | 2020年 / 65卷 / 07期
基金：
中国国家自然科学基金;
关键词：
continuous phase modulation; low SNR; instantaneous frequency; signal estimate; Viterbi algorithm; ALGORITHM;
D O I：
10.1134/S1064226920070128
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A low computational complexity scheme based on the modified Wigner-Ville distribution (MWVD) is developed for estimating the instantaneous frequency of continuous phase modulation (CPM) signals under low signal-to-noise ratio (SNR) scenario. To simplify the computation of the MWVD, a low order Chebyshev polynomial is chosen as the kernel function for suppressing the cross-terms. The implementation of this instantaneous frequency (IF) estimator is done through the Viterbi algorithm. The simulation results show that our scheme outperforms other estimating methods under low SNR scenario.
引用
收藏
页码：843 / 847
页数：5
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