Open AccessOFDM MIMO radar waveform design for targets identification
Author(s) -
Bai Ting,
Zheng Nae,
Chen Song
Publication year - 2018
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.2018-0010
Subject(s) - orthogonality , mimo , orthogonal frequency division multiplexing , electronic engineering , radar , computer science , mimo ofdm , algorithm , mathematics , engineering , telecommunications , beamforming , channel (broadcasting) , geometry
In order to obtain better target identification performance, an efficient waveform design method with high range resolution and low sidelobe level for orthogonal frequency division multiplexing ( OFDM ) multiple‐input multiple‐output ( MIMO ) radar is proposed in this paper. First, the wideband CP ‐based OFDM signal is transmitted on each antenna to guarantee large bandwidth and high range resolution. Next, a complex orthogonal design ( COD ) is utilized to achieve code domain orthogonality among antennas, so that the spatial diversity can be obtained in MIMO radar, and only the range sidelobe on the first antenna needs suppressing. Furthermore, sidelobe suppression is expressed as an optimization problem. The integrated sidelobe level ( ISL ) is adopted to construct the objective function, which is solved using the Broyden‐Fletcher‐Goldfarb‐Shanno ( BFGS ) algorithm. The numerical results demonstrate the superiority in performance (high resolution, strict orthogonality, and low sidelobe level) of the proposed method compared to existing algorithms.