This paper studies the problem of estimation of array gain and phase errors in a collocated multiple-input multiple-output (MIMO) radar. An array model for a monostatic collocated MIMO radar is presented, and a method that estimates the gain and phase errors for MIMO radar systems is also given. By using the transmitted orthogonal waveforms to match the received signals, a "virtual array" similar to the conventional array can be obtained. Based on the time-sharing data, the phase caused by the direction of arrival (DOA) of the time-sharing signal and the gain and phase errors are separated from each other in the "virtual array" real steering vector. A cost function is structured to get the DOA estimation, and then the gain and phase errors are estimated based on the DOA estimates obtained afore. The remainder error induced by the estimation process is analyzed. Finally, the validity of the model is testified through computer simulation. The method introduced in this paper is simple and feasible, and suitable for any array manifold.
XU Qing
,
LIAO Guisheng
,
ZHANG Juan
,
ZENG Cao
. An Estimation Method for MIMO Radar Gain and Phase Errors[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012
, (3)
: 530
-536
.
DOI: CNKI:11-1929/V.20111107.1045.009
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