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High-performance MIMO imaging radar with hybrid transmit and receive arrays

Published online by Cambridge University Press:  28 March 2016

M. Nhat Pham  and
Arne F. Jacob
M. Nhat Pham*
Affiliation:
Institut für Hochfrequenztechnik, Technical University, Hamburg-Harburg, 21073 Hamburg, Germany. Phone: +49 40 42878 2758
Arne F. Jacob
Affiliation:
Institut für Hochfrequenztechnik, Technical University, Hamburg-Harburg, 21073 Hamburg, Germany. Phone: +49 40 42878 2758
*
Corresponding author:M. N. Pham Email: [email protected]
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Abstract

In this study, a sparse multiple-input multiple-output radar system with difference co-array processing is presented. It consists of two non-uniform transmitter arrays in split configuration and a symmetrical hybrid receiver array. A combination of a periodically thinned array and two non-uniform sub-arrays is used to construct the receiver structure. A low-cost three-step optimization procedure is proposed to synthesize the array arrangement with system constraints. In addition, a combination of fast Fourier transform (FFT) and MUltiple SIgnal Classification (MUSIC) techniques is applied for a range/direction-of-arrival estimation with low computational effort. High angular resolution is achieved in the MUSIC spectrum by implementing a difference co-array concept together with spatial smoothing. A thinning rate in excess of 95% is demonstrated. Lastly, the performance of the proposed system is validated by measurements of point scatterers and extended objects.

Keywords

MIMOdifference co-arraythinned arrayMUSICspatial smoothing
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Special Issue 4-5: EuMW 2015 Special Issue , June 2016 , pp. 807 - 813
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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