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Proceedings Paper

MIMO radar systems based on the generalized detector and space-time coding
Author(s): Vyacheslav Tuzlukov
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Paper 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.

Paper Details

Date Published: 15 April 2010
PDF: 12 pages
Proc. SPIE 7698, Signal and Data Processing of Small Targets 2010, 769805 (15 April 2010); doi: 10.1117/12.850668
Show Author Affiliations
Vyacheslav Tuzlukov, Kyungpook National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7698:
Signal and Data Processing of Small Targets 2010
Oliver E. Drummond, Editor(s)

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