A Reconfigurable MIMO-SAR Transmission Scheme Based on Inter-Pulse and Intra-Pulse Joint Phase Modulation

被引：29
作者：
Jin, Guodong [1 ,2 ]
Wang, Yu [1 ,2 ]
Zhu, Daiyin [1 ,2 ]
Niu, Shilin [1 ,2 ]
Yan, He [1 ,2 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 211106, Jiangsu, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing 211106, Jiangsu, Peoples R China
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2022年 / 70卷
关键词：
Phase modulation; Azimuth; Transmitting antennas; Doppler effect; Synthetic aperture radar; System performance; Encoding; Multiple-Input Multiple-Output Synthetic Aperture Radar (MIMO-SAR); echo separation; inter-pulse phase modulation; intra-pulse phase modulation; SYNTHETIC-APERTURE RADAR; WAVE-FORM; PERFORMANCE OPTIMIZATION; DESIGN; AMBIGUITY; RECONSTRUCTION; CODES;
D O I：
10.1109/TSP.2022.3200873
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The echo separation issue associated with different transmit antennas is the most technical challenge in realizing the Multiple-Input Multiple-Output (MIMO) Synthetic Aperture Radar (SAR) system. In this paper, a reconfigurable MIMO-SAR transmission scheme based on inter-pulse and intra-pulse joint phase modulation is proposed. The proposed scheme has many advantages. First, lots of monostatic waveforms can be directly employed in a MIMO-SAR system, which offers flexibility in waveform selection. Second, according to different MIMO-SAR applications, it is reconfigurable and can flexibly adjust the system Degree of Freedoms (DoFs) to accomplish echo separation, achieving the best system performance, which is the key for the multimodal operation of MIMO-SARs. Finally, due to the limited system resources in the real MIMO-SAR system, it is hard to separate echo in a single domain, and the proposed scheme jointly capitalizes DoFs of Doppler, time, and space domains to ensure the successful echo separation. In addition, detailed simulation experiments are carried out to verify the practicability and effectiveness of the newly proposed transceiver schemes.
引用
收藏
页码：4265 / 4276
页数：12
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