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Calibration Method of Array Errors for Wideband MIMO Imaging Radar Based on Multiple Prominent Targets
| Content Provider | MDPI |
|---|---|
| Author | Zhao, Zheng Tian, Weiming Deng, Yunkai Hu, Cheng Zeng, Tao |
| Copyright Year | 2021 |
| Description | Wideband multiple-input-multiple-output (MIMO) imaging radar can achieve high-resolution imaging with a specific multi-antenna structure. However, its imaging performance is severely affected by the array errors, including the inter-channel errors and the position errors of all the transmitting and receiving elements (TEs/REs). Conventional calibration methods are suitable for the narrow-band signal model, and cannot separate the element position errors from the array errors. This paper proposes a method for estimating and compensating the array errors of wideband MIMO imaging radar based on multiple prominent targets. Firstly, a high-precision target position estimation method is proposed to acquire the prominent targets’ positions without other equipment. Secondly, the inter-channel amplitude and delay errors are estimated by solving an equation-constrained least square problem. After this, the element position errors are estimated with the genetic algorithm to eliminate the spatial-variant error phase. Finally, the feasibility and correctness of this method are validated with both simulated and experimental datasets. |
| Starting Page | 2997 |
| e-ISSN | 20724292 |
| DOI | 10.3390/rs13152997 |
| Journal | Remote Sensing |
| Issue Number | 15 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-30 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Imaging Science Mimo Imaging Radar Array Error Calibration Inter-channel Error Element Position Error Prominent Target |
| Content Type | Text |
| Resource Type | Article |
