Signal processing for 0.14 THz high resolution imaging radar

被引：2

作者：

Cheng, Binbin ^{[1
,2
]}

Jiang, Ge ^{[1
]}

Yang, Chen ^{[1
]}

Cai, Yingwu ^{[1
,2
]}

机构：

[1] Institute of Electronic Engineering, China Academy of Engineering Physics

[2] Terahertz Research Center, China Academy of Engineering Physics

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2013年 / 25卷 / 06期

关键词：

High resolution; Inverse synthetic aperture radar imaging; Nonlinearity compensation; Terahertz radar;

D O I：

10.3788/HPLPB20132506.1577

中图分类号：

学科分类号：

摘要：

A real-time signal processing system was designed for the 0.14 THz high resolution imaging radar. The hardware structure was established using CPU+GPU+FPGA to enhance its operation ability. In this inverse synthetic aperture radar (ISAR), the range-Doppler algorithm is used to get higher imaging speed, and L-class Wigner-Ville distribution (LWVD) is adopted to improve the cross-range resolution. An algorithm called Keystone transformation is used to dispose the time domain signal by de-chirp processing, and it eliminates the migration through resolution cell (MTRC) in the target imaging. A method of chirp nonlinearity compensation for the imaging system was also proposed. This signal processing module was applied to a terahertz radar system with 0.14 THz carrier frequency and 5 GHz bandwidth. ISAR images were obtained by using this THz radar system with 3 cm resolution in both range and cross-range profiles, showing the validity of the signal processing method.

引用

页码：1577 / 1581

页数：4

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