Title :
Orthogonal Frequency Diversity Waveform with Range-Doppler Optimization for MIMO Radar
Author :
Caicai Gao ; Kah Chan Teh ; Aifei Liu
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
In this letter, we modify the transmitted signal of the discrete frequency coding waveform with linear frequency modulation (DFCW-LFM) for multiple-input multiple-output (MIMO) radar from contiguous subpulses to an inconsecutive pulse train. The range-Doppler map is obtained by performing fast Fourier transform (FFT) after the transmit beamformer to detect the moving target. The cost function of the genetic algorithm used to optimize the carrier frequency sequence is obtained by minimizing both the range-Doppler sidelobes and cross-correlation peaks. Compared with the DFCW-LFM, the proposed waveform has lower autocorrelation sidelobes and cross-correlation for the delay within the subpulse duration.
Keywords :
Doppler radar; MIMO radar; fast Fourier transforms; frequency modulation; genetic algorithms; radar detection; DFCW-LFM; FFT; MIMO radar; autocorrelation sidelobes; carrier frequency sequence; contiguous subpulses; cross-correlation peaks; discrete frequency coding waveform with linear frequency modulation; fast Fourier transform; genetic algorithm; inconsecutive pulse train; moving target detection; multiple-input multiple-output radar; orthogonal frequency diversity waveform; range-Doppler optimization; range-Doppler sidelobes; subpulse duration; Chirp modulation; Correlation; Delays; Doppler effect; Frequency modulation; MIMO; Transmitting antennas; Autocorrelation; cross-correlation; frequency diversity waveform; mimo radar; range-doppler optimization;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2014.2329944
