多频段高倍频双啁啾线性调频信号产生方法

doi:10.3969/j.issn.1007-5461.2025.05.008

量子电子学报 ›› 2025, Vol. 42 ›› Issue (5): 663-676.doi: 10.3969/j.issn.1007-5461.2025.05.008

多频段高倍频双啁啾线性调频信号产生方法

邢毓华 , 师腾飞 *

西安理工大学自动化与信息工程学院, 陕西西安 710048

收稿日期:2024-05-29 修回日期:2024-07-09 出版日期:2025-09-28 发布日期:2025-09-28
通讯作者: E-mail: 1393817405@qq.com E-mail:E-mail: 1393817405@qq.com
作者简介:邢毓华 ( 1966 - ), 陕西西安人, 硕士, 副教授, 硕士生导师, 主要从事大数据及物联网通信技术等方面的研究。 E-mail: xyh@xaut.edu.cn

Multi-band high frequency dual-chirp waveform generation method

XING Yuhua, SHI Tengfei*

School of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China

Received:2024-05-29 Revised:2024-07-09 Published:2025-09-28 Online:2025-09-28

摘要/Abstract

摘要： 针对雷达系统中线性调频信号载波频段单一和带宽倍频系数较低的问题, 本文提出了一种双啁啾线性调频信号产生方法。该方法使用双平行马赫-曾德尔调制器级联马赫-曾德尔调制器, 生成中心频率分别为射频驱动信号频率的 2 倍、6 倍和 10 倍, 同时带宽增加 4 倍的双啁啾线性调频信号。对所提方法进行仿真验证, 生成了带宽为 4 GHz, 中心频率分别为20、60、100 GHz, 时间带宽积为742.4的双啁啾线性调频信号。进一步对生成信号进行自相关处理和模糊函数性能分析, 结果表明, 该信号表现出较好的峰值旁瓣比和脉冲压缩性能, 模糊函数降低为单啁啾线性调频信号的1/4, 降低了距离-多普勒耦合效应所导致的目标定位误差, 有效提升了雷达系统的探测性能。

关键词: 光通信, 双平行马赫-曾德尔调制器, 双啁啾信号, 微波光子, 多频段

Abstract: Aiming at the problems of single carrier frequency band and low bandwidth frequency multiplication of linear frequency modulation (LFM) signal in radar system, a method of generating dualchirp linear frequency modulation signal is proposed. The method uses dual-parallel Mach-Zehnder modulators cascaded with a Mach-Zehnder modulator to generate dual-chirp LFM signals with center frequencies of two, six and ten times the frequency of the RF driver signal, while increasing the bandwidth by four times. The proposed method is simulated and verified, and the dual-chirp LFM signals with a bandwidth of 4 GHz, center frequencies of 20 GHz, 60 GHz and 100 GHz, and a time bandwidth product (TBWP) of 742.4 are generated. Furthermore, autocorrelation processing and ambiguity function performance analysis are performed on the generated signals, and the results show that the signals exhibit good peak sidelobe ratio and pulse compression performance, and the ambiguity function is reduced to 1/4 of that of single chirp frequency modulation signals, which effectively reducing the target location error caused by range-Doppler coupling effect and improving the detection performance of the radar system.

Key words: optical communications, dual-parallel Mach-Zehnder modulator, dual-chirp signal, microwave photonics, multi-band

中图分类号:

TN929.1

邢毓华, 师腾飞 . 多频段高倍频双啁啾线性调频信号产生方法[J]. 量子电子学报, 2025, 42(5): 663-676.

XING Yuhua, SHI Tengfei. Multi-band high frequency dual-chirp waveform generation method[J]. Chinese Journal of Quantum Electronics, 2025, 42(5): 663-676.

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多频段高倍频双啁啾线性调频信号产生方法

Multi-band high frequency dual-chirp waveform generation method

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