MIMO radar systems based on the generalized detector and space-time coding

Vyacheslav Tuzlukov

doi:10.1117/12.850668

15 April 2010 MIMO radar systems based on the generalized detector and space-time coding

Vyacheslav Tuzlukov

Proceedings Volume 7698, Signal and Data Processing of Small Targets 2010; 769805 (2010) https://doi.org/10.1117/12.850668
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

In this paper, we consider the problem of multiple-input multiple-output (MIMO) radars employing the generalized detector based on the generalized approach to signal processing in noise and using the space-time coding to achieve desired diversity. To that end, we derive a suitable generalized detector structure after briefly outlining the model of the received target return signal. The generalized detector performance is expressed in closed form as a function of the clutter statistical properties and of the space-time code matrix. We investigate a particular case when the generalized detector requires a priori knowledge of the clutter covariance, i.e., the decision statistics, under the null hypothesis of no target, is an ancillary statistic, in the sense that it depends on the actual clutter covariance matrix, but its probability density function (pdf) is functionally independent of such a matrix. Therefore, threshold setting is feasible with no a priori knowledge as to the clutter power spectrum. As to the detection performance, a general integral form of the detection probability is provided, holding independent of the target fluctuation model. The formula is not analytically manageable, nor does it appear to admit general approximate expressions, which allow giving an insightful look in the system behavior. We thus restrict our attention to the case of Rayleigh-distributed target attenuation (Swerling-1 model). To code construction we use an information-theoretic approach. This approach offers a methodological framework for space-time coding in MIMO radar systems, as well as simple and intuitive bounds for performance prediction.

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Vyacheslav Tuzlukov "MIMO radar systems based on the generalized detector and space-time coding", Proc. SPIE 7698, Signal and Data Processing of Small Targets 2010, 769805 (15 April 2010); https://doi.org/10.1117/12.850668

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KEYWORDS

Radar

Atrial fibrillation

Signal processing

Sensors

Interference (communication)

Antennas

Target detection

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