Title :
Real-Time Imaging With a 140 GHz Inverse Synthetic Aperture Radar
Author :
Binbin Cheng ; Ge Jiang ; Cheng Wang ; Chen Yang ; Yingwu Cai ; Qi Chen ; Xiang Huang ; Genghua Zeng ; Jun Jiang ; Xianjin Deng ; Jian Zhang
Author_Institution :
Inst. of Electron. Eng., China Acad. of Eng. Phys., Mianyang, China
Abstract :
A summary of a 140 GHz inverse synthetic aperture radar (ISAR) is presented. High resolution and real time imaging are two key points in the design. Using the frequency-modulated continuous-wave (FMCW) radar technique with a 5 GHz bandwidth, 3 cm range resolution is achieved with assistance of software calibration compensating for nonlinearities of the LFM waveform. In cross-range region, synthetic aperture technique is adopted to improve imaging resolution. Real time imaging capability is enabled by using a hardware structure constructed with FPGA+CPU+GPU in signal processing unit. The final system was used to get ISAR image of a rotating target at 5 m. The 2-D (range and cross-range) imaging resolution is 3 cm × 3 cm with a real time image frame rate of 5 Hz.
Keywords :
CW radar; FM radar; calibration; field programmable gate arrays; graphics processing units; radar imaging; synthetic aperture radar; 2-D imaging resolution; CPU; FPGA; GPU; ISAR; LFM waveform; bandwidth 5 GHz; frequency 140 GHz; frequency-modulated continuous-wave radar technique; hardware structure; high resolution imaging; imaging resolution; inverse synthetic aperture radar; real time image frame rate; real-time imaging; rotating target; signal processing unit; software calibration; Bandwidth; Image resolution; Imaging; Mixers; Radar imaging; Real-time systems; ISAR; Real time imaging; terahertz (THz) radar;
Journal_Title :
Terahertz Science and Technology, IEEE Transactions on
DOI :
10.1109/TTHZ.2013.2268317
