High Resolution MIMO-HFSWR Radar Using Sparse Frequency Waveforms

Guohua WANG, Yilong LU

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DOI: 10.4236/wsn.2009.13021                

Abstract

In high frequency surface wave radar (HFSWR) applications, range and azimuth resolutions are usually lim-ited by the bandwidth of waveforms and the physical dimension of the radar aperture, respectively. In this paper, we propose a concept of multiple-input multiple-output (MIMO) HFSWR system with widely sepa-rated antennas transmitting and receiving sparse frequency waveforms. The proposed system can overcome the conventional limitation on resolutions and obtain high resolution capability through this new configura-tion. Ambiguity function (AF) is derived in detail to evaluate the basic resolution performance of this pro-posed system. The advantages of the system of fine resolution and low peak sidelobe level (PSL) are demon-strated by the AF analysis through numerical simulations. The impacts of Doppler effect and the geometry configuration are also studied.

Keywords

MIMO, HFSWR, Radar, Sparse Frequency Waveform

Conflicts of Interest

The authors declare no conflicts of interest.

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