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High-performance MIMO imaging radar with hybrid transmit and receive arrays
Publikationstyp
Conference Paper
Date Issued
2016-06-01
Sprache
English
Author(s)
Institut
TORE-URI
Volume
8
Issue
4-5
Start Page
807
End Page
813
Citation
International Journal of Microwave and Wireless Technologies 4-5 (8): 807-813 (2016-06-01)
Publisher DOI
Scopus ID
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.
Subjects
difference co-array
MIMO
MUSIC
spatial smoothing
thinned array