MIMO OFDM Radar IRCI Free Range Reconstruction with Sufficient Cyclic Prefix
Xiang-Gen Xia, Tianxian Zhang, and Lingjiang Kong

TL;DR
This paper introduces a MIMO OFDM radar system with sufficient cyclic prefix that achieves IRCI-free range reconstruction, full spatial diversity, and high SNR, while maintaining orthogonality across transmitters and range cells.
Contribution
It proposes a novel MIMO OFDM radar design with orthogonal pulses, joint pulse compression, and a MICF algorithm to optimize pulse design considering PAPR, enhancing range resolution and interference mitigation.
Findings
Achieves IRCI-free range reconstruction across transmitters and range cells.
Outperforms existing frequency-band shared MIMO radar and frequency division MIMO radar.
Maintains the same range resolution as single transmitter radar.
Abstract
In this paper, we propose MIMO OFDM radar with sufficient cyclic prefix (CP), where all OFDM pulses transmitted from different transmitters share the same frequency band and are orthogonal to each other for every subcarrier in the discrete frequency domain. The orthogonality is not affected by time delays from transmitters. Thus, our proposed MIMO OFDM radar has the same range resolution as single transmitter radar and achieves full spatial diversity. Orthogonal designs are used to achieve this orthogonality across the transmitters, with which it is only needed to design OFDM pulses for the first transmitter. We also propose a joint pulse compression and pulse coherent integration for range reconstruction. In order to achieve the optimal SNR for the range reconstruction, we apply the paraunitary filterbank theory to design the OFDM pulses. We then propose a modified iterative clipping…
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Taxonomy
TopicsPAPR reduction in OFDM · Radar Systems and Signal Processing · Wireless Communication Networks Research
