摘要
从线性调频中断连续波 (FMICW)基本原理出发 ,结合雷达方程和相控阵技术 ,阐述了在 OS-MAR2 0 0 0总体设计和研制过程中遇到的几个主要问题 ,如雷达探测性能估计、雷达波形设计、雷达参数的选择、相控阵形式、I/ Q形成方式、数据采集与 Doppler提取、距离混迭与 Doppler频率混迭、零频干扰等 .东海现场实验表明 ,采用 12 0 m八元相控天线阵 ,“一发八收”、收发共用天线工作模式 ,平均发射功率 10 0 W,可实现 2 0 0 km,12 0°扇面海流探测和 10 0
Some important problems in the system design and development of the HF Ground Wave Radar (GWR) OSMAR2000 are discussesd, concerning 1) estimation of GWR detection capabilities;2) frequency modulated interrupted continuous wave (FMICW) and pseudo noise phase modulation; 3) means to oppress near\|sea echos;4) broad\|beam phased array antenna and digital beam forming (DBF) technique; 5) echo signal processing and zero\|frequency interfere restricting approaches; 6) forming mode of I/Q; 7) elimination of distance overlap and Doppler frequency overlap. In the fieldwork in Chinese East Sea we found that by using 120 m long, 8 antenna in which one for transmitting and all 8 for receiving, OSMAR2000 can detect current more than 200 km away with 120° augular coverage and angular resolutionin of 2° to 5° in the daytime, and wind and wave at the distance of 100 km. Our next research will concentrate on antenna miniaturization and universal GWR hardware platform using software radio technique as well as improve inversion algorithm for wind and wave.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2001年第5期513-518,共6页
Journal of Wuhan University:Natural Science Edition
基金
国家 8 63计划资助项目 (863 -818-0 1-0 2 )
