Journal
IEEE SENSORS JOURNAL
Volume 15, Issue 10, Pages 5694-5700Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2015.2448617
Keywords
Waveform diversity; multiple-input multiple-output (MIMO) radar; orthogonal frequency division multiplexing (OFDM); direct sequence spread spectrum (DSSS); spread spectrum coded OFDM chirp (SSCOC); ambiguity function
Funding
- National Natural Science Foundation of China [41101317]
- Program for New Century Excellent Talents in University [NCET-12-0095]
- Sichuan Province Science Fund for Distinguished Young Scholars [2013JQ0003]
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This paper proposes an approach to design multiple-input multiple-output radar waveforms that are orthogonal on both the transmitter and receiver. The proposed method jointly utilizes the direct sequence spread spectrum coding and orthogonal frequency division multiplexing (OFDM) chirp signaling techniques. We name it spread spectrum-coded OFDM chirp waveform diversity design. The performance of the designed waveforms is analyzed by examining the ambiguity function and correlation function. The influences of the spread spectrum code choice and the OFDM chirp parameters are also investigated. It is verified that the proposed design scheme can ensure these waveforms stay orthogonal on the receiver and have large time-bandwidth product which is beneficial to separate closely spaced targets.
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