On DOA Estimation Error of Moving Target by Using TDM-MIMO Radar

Suguru OHASHI  Hiroyoshi YAMADA  Yoshio YAMAGUCHI  

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J101-B   No.7   pp.528-538
Publication Date: 2018/07/01
Online ISSN: 1881-0209
DOI: 
Type of Manuscript: Special Section PAPER (Special Section for Encouraging Young Researchers)
Category: 
Keyword: 
MIMO radar,  time division multiplexing,  DOA estimation,  moving target,  

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Summary: 
When we apply the concept of Multiple-Input Multiple-Output (MIMO) to radar, we can enhance effective array aperture. Hence, the direction-of-arrival (DOA) estimation accuracy can be improved. For realizing the MIMO radar, time division multiplexing (TDM) is acceptable because of no overlapping between any two transmissions. Such a system will be preferable in many applications from hardware complexity. Since this system uses TDM, doppler frequency of moving target causes DOA estimation error. In this paper, we analyze DOA estimation error for the moving target in the TDM-MIMO radar, and derive asymptotic error formula. The results are verified by computer simulations.