Session 3B.2
MIMO radar: an idea whose time has come

Eran Fishler - New Jersey Inst. of Tech., Alexander Haimovich - New Jersey Institute of Technology, Rick Blum - Lehigh University, Dmitry chizhik - Bell Labs - Lucent Technologies, Len Cimini - University of Delaware, Reinaldo Valenzuel - Bell Labs - Lucent Technologies

Tue, 27 April 2004, 1:30 PM - 3:20 PM

Abstract

It has been recently shown that multiple-input multiple-output (MIMO) antenna systems have the potential to dramatically improve the performance of communication systems over single antenna systems. Unlike beamforming, which presumes a high correlation between signals either transmitted or received by an array, the MIMO concept exploits the independence between signals at the array elements. In conventional radar, target scintillations are regarded as a nuisance parameter that degrades radar performance. The novelty of MIMO radar is that it takes the opposite view, namely, it capitalizes on target scintillations to improve the radar?s performance. In this paper, we introduce the MIMO concept for radar. The MIMO radar system under consideration consists of a transmit array with widely-spaced elements such that each views a different aspect of the target. The array at the receiver is a conventional array used for direction finding (DF). The system performance analysis is carried out in terms of the Cramer-Rao bound of the meansquare error in estimating the target direction. It is shown that MIMO radar leads to significant performance improvement in DF accuracy.