摘要
高频地波雷达探测海洋状况和跟踪移动目标时 ,由于所处的高频段电磁环境极其恶劣 ,各种瞬态干扰会严重影响雷达的探测效果。对线性调频体制下雷达回波信号的处理进行了分析 ,讨论了抑制瞬态干扰的方法。构造了Hankel矩阵进行SVD分解[7] 来抑制海杂波的影响 ,利用小波变换在距离时间序列上检测出瞬态干扰 ,在此基础上 ,使用基于最小二乘格形 (LSL)自适应算法来恢复多普勒信号 ,抑制了瞬态干扰对雷达的影响。实测数据表明 ,它可有效地提高了高频地波雷达抗瞬态干扰的能力。
Over the past two decades,significant advances have been made in the use of high frequency ground wave (HFGW) radar for remote sensing in an ocean environment. Because the high frequency band is a hostile electromagnetic environment,all kinds of instantaneous interferences may badly affect HFGW radar′s performance. Through analyzing the instantaneous interference′s singularity characteristic showed in range-time sequence,this paper presents wavelet transform to detect instantaneous interference in range-time sequence after using a Hankel rank reduction method [7] to suppress sea clutter, and a method to resume Doppler signal based on LSL adaptive prediction model. Experiments show that the anti-instantaneous interference ability of HFGW radar is enhanced via taking advantage of this method.
出处
《电波科学学报》
EI
CSCD
2004年第2期166-170,共5页
Chinese Journal of Radio Science
基金
"十五"高科技发展计划项目 (2 0 0 1AA6 310 5 0 )
