Large Time-Bandwidth Product MIMO Radar Waveform Design Based on Chirp Rate Diversity

Design of Optimized Coded LFM Waveform for Spectrum Shared Radar System

“…Several researchers have proposed the use of chirp diversity to generate orthogonal waveforms [9][10][11][12][13][14]. Welstead studied the relationship between the chirp rate and the level of interferences between two LFM signals with the same pulse width and showed that, as the difference of the chirp rates of two LFM waveforms increases, they become less correlated [9].…”

“…However, when two signals with the same pulse width have different chirp rates, the bandwidth of one signal is wider than that of the other signal. Like [10], in [11][12][13][14], the authors exploited chirp diversity to generate orthogonal waveforms using a signal composed of several sub-chirps with different chirp rates. Unlike previous studies [9,10], the authors in [11][12][13][14] exploited chirp diversity, but bounded the bandwidth so that all signals had the same bandwidth.…”

“…Like [10], in [11][12][13][14], the authors exploited chirp diversity to generate orthogonal waveforms using a signal composed of several sub-chirps with different chirp rates. Unlike previous studies [9,10], the authors in [11][12][13][14] exploited chirp diversity, but bounded the bandwidth so that all signals had the same bandwidth. In [11], the author developed a waveform consisting of up-chirps and down-chirps within the bounded bandwidth and repeated the waveform within the pulse width.…”

“…Unlike previous studies [9,10], the authors in [11][12][13][14] exploited chirp diversity, but bounded the bandwidth so that all signals had the same bandwidth. In [11], the author developed a waveform consisting of up-chirps and down-chirps within the bounded bandwidth and repeated the waveform within the pulse width. The method for developing a waveform in [11] showed very good cross-correlation performance between a pair of waveforms with different chirp rates.…”

Phaseless Radar Coincidence Imaging with a MIMO SAR Platform

“…MIMO radar involves leveraging the large number of degrees of freedom offered by transmitting and receiving arrays for improved system performance in terms of resolution or detection capabilities [7,8]. Instead of sequentially switching through each channel in the MIMO system, significant effort has gone into investigating orthogonal coding schemes in order to access these additional degrees of freedom for post processing [8][9][10][11][12][13]. This enables rapid signal acquisition through simultaneous illumination and reception among all of the array elements, with the potential for high-speed and high-resolution, wide-swath radar.…”