# An Efficient Maritime Target Joint Detection and Imaging Method with Airborne ISAR System

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## Abstract

**:**

## 1. Introduction

- i
- It circumvents maritime target detection and clutter suppression performances degradation in the ISAR system, which is achieved by eliminating the RW and target extending issues based on the sub-band STAP;
- ii
- The coarse estimation of target R-D location obtained in the sub-band STAP output is subsequently utilized as a priori knowledge, which gives facilities to the fast full-band STAP applied in the localized R-D zone for the simultaneous clutter suppression and high-resolution ISAR imaging.

## 2. Signal Model

## 3. ISAR Imaging Based on the Multi-Resolution STAP

#### 3.1. Robust Clutter Suppression with Sub-Band STAP

#### 3.2. Efficient ISAR Imaging with the Full-Band STAP

## 4. Simulation Results

#### 4.1. SCNR-Enhanced Sub-Band STAP

#### 4.2. Efficient ISAR Imaging with Full-Band STAP

## 5. Conclusions

## Author Contributions

## Funding

## Conflicts of Interest

## References

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**Figure 3.**Simulation results of multi-resolution STAP. (

**a**) Echo spectrum without clutter suppression in the R-D domain. (

**b**) Full-band STAP output in the R-D domain. (

**c**) Sub-band STAP output in the R-D domain.

**Figure 4.**Simulation results of ISAR imaging. (

**a**) Sliding window STAP-based ISAR imaging result. (

**b**) ISAR imaging result of the proposed method.

Parameter | Value | Parameter | Value |
---|---|---|---|

Carrier frequency | 10 GHz | Platform height | 10 km |

Full bandwidth | 50 MHz | Platform velocity | 150 m/s |

CPI | 0.7 s | Array number | 8 |

PRF | 6 kHz | Pulse width | 10 µs |

Slant range of target | 250 km | clutter-to-noise ratio | 40 dB |

SNR | −10 dB | Target velocity | 19.5 m/s |

Sub-band width | 10 MHz | Target rotation vector | 0.0175 rad/s |

Methods | Output SCNR |
---|---|

Conventional full-band STAP | 1.42 dB |

Sub-band STAP | 9.63 dB |

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**MDPI and ACS Style**

Li, H.; Liao, G.; Xu, J.; Lan, L.
An Efficient Maritime Target Joint Detection and Imaging Method with Airborne ISAR System. *Remote Sens.* **2022**, *14*, 193.
https://doi.org/10.3390/rs14010193

**AMA Style**

Li H, Liao G, Xu J, Lan L.
An Efficient Maritime Target Joint Detection and Imaging Method with Airborne ISAR System. *Remote Sensing*. 2022; 14(1):193.
https://doi.org/10.3390/rs14010193

**Chicago/Turabian Style**

Li, Haodong, Guisheng Liao, Jingwei Xu, and Lan Lan.
2022. "An Efficient Maritime Target Joint Detection and Imaging Method with Airborne ISAR System" *Remote Sensing* 14, no. 1: 193.
https://doi.org/10.3390/rs14010193