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Beamforming issues in modern MIMO Radars with Doppler

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2 Author(s)
Chun-Yang Chen ; Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA ; Vaidyanathan, P.P.

In traditional beamforming radar systems, the transmitting antennas send coherent waveforms which form a highly focused beam. In the MIMO radar system, the transmitter sends noncoherent (possibly orthogonal) broad (possibly omni-directional) waveforms. These waveforms can be extracted by a matched filterbank at the receiver. The extracted signals can be used to obtain more diversity or improve the clutter resolution. This paper focuses on space-time adaptive processing (STAP) for MlMO radar systems which improves the clutter resolution. The size of the MIMO STAP steering vector can be much larger than the traditional SIMO STAP steering vector because of the extra dimension. An accurate estimation of clutter rank for the subspace method is developed, and is a generalization of Brennan's rule to the MIMO radar case. A data independent method for estimating the clutter subspace is also described.

Published in:

Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on

Date of Conference:

Oct. 29 2006-Nov. 1 2006