Slow-Time MIMO Waveform Design Using Pulse-Agile-Phase-Coding for Range Ambiguity Mitigation
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Published:2023-07-04
Issue:13
Volume:15
Page:3395
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ISSN:2072-4292
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Container-title:Remote Sensing
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language:en
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Short-container-title:Remote Sensing
Author:
Chang Shaoqiang12ORCID, Yang Fawei1ORCID, Liang Zhennan1, Ren Wei3ORCID, Zhang Hao1, Liu Quanhua13ORCID
Affiliation:
1. Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China 2. Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China 3. Department of Computing, The Hong Kong Polytechnic University, Hong Kong 999077, China
Abstract
This paper proposed a Pulse-Agile-Phase-Coding slow-time MIMO (PAPC-st-MIMO) waveform, where the phase-coded signal is utilized as the intra-pulse modulation of the slow-time MIMO waveform. Firstly, the signal model of the proposed waveform is derived. To improve the orthogonality of the phase-coded waveform sets, a novel hybrid evolutionary algorithm based on Cyclic Algorithm New (CAN) is proposed. After the optimization process of the phase-coded waveform sets, the signal processing method of the PAPC-st-MIMO waveform is derived. Finally, the effectiveness of the proposed method is verified with a simulation experiment. The mitigation ratio of the near-range detection waveform can achieve −30 dB, while the long-range detection waveform can achieve −35 dB. This approach ensures waveform orthogonality while enabling the slow-time MIMO waveform to achieve distance selectivity. By conducting joint pulse-Doppler processing across multiple range segments, range ambiguity can be suppressed, increasing the system’s Pulse Repetition Frequency (PRF) without introducing ambiguity.
Funder
Beijing Institute of Technology Research Fund Program for Young Scholars National Natural Science Foundation of China
Subject
General Earth and Planetary Sciences
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