Target statistical correlation characteristic for spatial–frequency jointly diversity multiple-input multiple-output radar

• Published in: IET radar, sonar & navigation Vol. 5; no. 6; pp. 638 - 649
• Main Authors: Zhou, S.H., Liu, H.W.
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 01.07.2011; The Institution of Engineering & Technology
• Subjects: Applied classical electromagnetism; Applied sciences; Carrier frequencies; Channels; Correlation coefficients; Detection, estimation, filtering, equalization, prediction; Diffraction, scattering, reflection; Electromagnetic wave propagation, radiowave propagation; Electromagnetism; electron and ion optics; Equivalence; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Information, signal and communications theory; Mathematical models; Navigation; Physics; Radar; Radiocommunications; Radiolocalization and radionavigation; Radiowave propagation; Signal and communications theory; Signal processing; Signal, noise; Sonar; Telecommunications; Telecommunications and information theory; Correlation coefficient; Electromagnetic wave scattering; MIMO system; Background; Multicarrier; Two dimensional model; Algorithm; Statistical method; Frequency characteristic; Spatial frequency; Electromagnetic wave propagation; Model matching; Carrier frequency; Radar; Signal processing; Frequency diversity; Multiple frequency; Target detection
• ISSN: 1751-8784; 1751-8792
• DOI: 10.1049/iet-rsn.2010.0153

In diversity multiple-input multiple-output (MIMO) radar system, the mutual correlation of target echo signals in its diversity channels is an important concern for designing signal processing algorithms. The target temporal, spatial and frequency correlation characteristic is studied at the background of a diversity MIMO radar with multiple widely separated radar sites all capable of working at multiple carrier frequencies. With a two-dimensional round-shaped scatterers centre target model, the correlation coefficient of target echo signals in any type of diversity channel pair (DCP) is proved to be a function of the target size and the equivalent frequency interval. The theoretical correlation coefficient is verified by numerical experiments. The correlation coefficient of target echo signals often depends on the target location, which is shown for two typical DCP types.