相干/同向信号波达方向与多普勒频率的联合估计

doi:10.13229/j.cnki.jdxbgxb201706037

Abstract

Abstract: This paper is concerned with the joint estimation problem of Directions of Arrival (DOAs) and Doppler Frequency (DF) for coherence and/or same-direction signals. An eigen-space based modified 2D-MUSIC algorithm is proposed. First, a generalized array signal model is established, which incorporates both DOAs and DFs information. Then, the covariance matrix of the received signals of antenna array is modified through conjugate reconstruction to make it applicable for joint estimation of DOAs and DFs for coherence and/or same-direction signals. On the basis of 2D-MUSIC algorithm, an eigen-space based algorithm for joint estimation of DOAs and DFs is presented, where the information of both signal and noise subspaces is utilized, and this algorithm can estimate the signal power as well. Besides, a modified eigen-space algorithm is given, which can also implement joint estimation of DOAs and DFs for coherence and/or same-direction signals, and it is superior to the modified 2D-MUSIC algorithm in term of estimation performance. Several contrastive simulation results are presented to elucidate the validity of the proposed algorithms.

Key words: information procession technology, directions of arrival (DOA) estimation, Doppler frequency estimation, coherent signals, same-direction signals, signal power estimation

CLC Number:

TN91

SHAN Ze-biao, LIU Xiao-song, WANG Chun-yang, SHI Yi-ran, SHI Yao-wu. Joint estimation of DOA and Doppler frequency for coherence and/or same-direction signals[J].吉林大学学报(工学版), 2017, 47(6): 1949-1956.

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