Multibeam radar based on linear frequency modulated waveform diversity

Date published

2018-08-09

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IET

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Article

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1751-8784

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Leon Kocjancic, Alessio Balleri and Thomas Merlet. Multibeam radar based on linear frequency modulated waveform diversity. IET Radar Sonar and Navigation, Volume 12, 2018, Issue 11, pp. 1320-1329

Abstract

Multibeam radar (MBR) systems based on waveform diversity require a set of orthogonal waveforms in order to generate multiple channels in transmission and extract them efficiently at the receiver with digital signal processing. Linear frequency modulated (LFM) signals are extensively used in radar systems due to their pulse compression properties, Doppler tolerance, and ease of generation. Here, the authors investigate the level of isolation between MBR channels based on LFM chirps with rectangular and Gaussian amplitude envelopes. The orthogonal properties and the mathematical expressions of the isolation are derived as a function of the chirp design diversity, and specifically for diverse frequency slopes and frequency offsets. The analytical expressions are validated with a set of simulations as well as with experiments at C-band using a rotating target.

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Github

Keywords

radar signal processing, frequency modulation, FM radar, radar antennas, signal processing, optical modulation, chirp modulation, diversity reception, pulse compression

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