摘要
针对高频地波雷达海洋动力学参数多频探测的技术特点,提出了一种基于波形库的软件化多频地波雷达频率合成器实现方案,可以同时和分时产生多路脉内线性调频信号,各路信号形式、频率、初相、幅度等都独立可控,解决了雷达波形种类、幅相控制、捷变时间受限等问题,较大提高雷达系统性能;给出系统的硬软件实现方案。测试结果表明,该数字频率源的相位噪声在偏离载波1 kHz处达-112 dBc/Hz,满足高频地波雷达进行长时间相干积累对频率源稳定性的要求。
A frequency synthesizer based on the waveform database for software defined multi-frequency surface wave sea state remote sensing radar is presented. It can generate multiple pulsed frequency modulated continuous wave simultaneously or time dividually, and the waveform, carrier frequency, initial phase and amplitude of which can be controlled independently. The performance of radar systems is improved greatly in the waveform types, amplitude and phase control, and frequency hopping time etc. The hardware and software structure is presented. Experimental results show that the phase noise of the frequency synthesizer is about -112 dBc/Hz at 1 kHz offset, which meets the stability demands of an HF surface wave radar for long coherent integration time.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第5期1060-1063,共4页
Systems Engineering and Electronics
基金
国家自然科学基金(60401003)
国家高技术研究发展计划"863"项目(2006AA09A303)资助课题
关键词
高频地波雷达
频率合成器
软件无线电
多频雷达
HF surface wave radar frequency synthesizer software defined radar multi frequency radar
