Phase Synchronization for MIMO Radars in the Absence of Channel Reciprocity

Kwanggoo YEO  Hyuk-soo SHIN  Hoon-gee YANG  Young-seek CHUNG  Myung-deuk JEONG  Wonzoo CHUNG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E97-A   No.5   pp.1130-1135
Publication Date: 2014/05/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E97.A.1130
Type of Manuscript: LETTER
Category: Digital Signal Processing
phase synchronization,  MIMO radar,  MLE,  channel reciprocity,  

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This letter presents a novel phase synchronization algorithm for a MIMO radar system in order to overcome the limitation of the existing algorithms relying on channel reciprocity, or line-of-sight, assumption between radar elements. The proposed algorithm is capable of synchronizing local oscillator phases among radar elements even if line-of-sight communication links are not available. Furthermore, the proposed algorithm exhibits robust MSE performance in the presence of frequency estimation error. The performance of the proposed algorithm was analyzed theoretically and verified by simulations.