雷达学报2019，Vol.8Issue(2)：189-196,8.
基于去调频接收技术的微波光子双波段线性调频连续波雷达
Dual-band LFM-CW Radar Scheme Based on Photonic Stretch Processing
摘要
Abstract
A dual-band LFM-CW radar scheme which is based on photonic stretch processing is proposed. The receiver which is based on a photonic frequency down-converter is able to receive the radar echoes of two bands with a single hardware. A dual polarization quadrature phase shift keying modulator is employed to implement the modulation scheme. The reference signals and echoes of two bands are modulated to orthogonally polarized light waves and sent to a Pol-demux coherent receiver through an amplifier and a filter, respectively, to perform stretch processing. In the transmitter, the reference and transmitted LFM signals with high frequency and wide bandwidth are generated by a photonic-assisted frequency multiplication module. Meanwhile, the generated signal is delayed before transmission. Thus, at the output of the coherent receiver, IF signals corresponding to two bands can be separated in the frequency domain. An experimental system operating in C- and Ku-bands with transmitting signal bandwidths of 1 and 2 GHz, respectively, is demonstrated and evaluated via a series of inverse synthetic aperture radar imaging tests, and the sampling rate of analog to digital converters is 100 MSa/s. The results show that the microwave photonics technology can provide solutions for receiving dual-band signal with a single hardware platform.关键词
线性调频连续波雷达/ 双波段雷达/ 光子混频器/ 光子倍频技术/ 去调频处理/Key words
LFM-CW radar/ Dual-band radar/ Photonics-assisted mixer/ Photonic frequency multiplication/ Stretch processing/分类
信息技术与安全科学引用本文复制引用
曹继明,李若明,杨继尧,孙强,李王哲..基于去调频接收技术的微波光子双波段线性调频连续波雷达[J].雷达学报,2019,8(2):189-196,8.基金项目
国家自然科学基金(61701476, 61690191) （61701476, 61690191）
