摘要
建立了微波稀布阵综合脉冲孔径雷达发射阵列的幅相误差模型,研究了基于近场窄脉冲和基于远场直达波的2种幅相误差校正方法:前者通过近场天线接收不同频率窄脉冲并进行通道分离、频谱分析等处理后提取幅相误差;后者通过远场天线接收直达波并在去调频后再提取幅相误差。前者运算量较小适用于工程实现;而后者运算量较大,在接收站定位精度较高时这种方法可获得较高的估计精度。仿真结果表明2种方法均能较好地估计幅相误差。
The amplitude-phase error model of transmit array in microwave sparse-array synthesis impulse and aperture radar, is constructed in this paper. And two calibration methods, which are near field method based on narrow impulses and far field method based on direct-path waves, are studied. The former method receives different-frequence narrow impulses from the near field antennas, and extracts the amplitude-phase error by channel separating and spectrum analysis. The latter one receives the direct-path waves from the far field antennas, and extracts the amplitude-phase error after dechirping. The former with small computational amounts can be applied in a project while the latter with great computational amounts can obtain high estimation accuracy when the receive site can be located accurately. The simulation results show that the two methods can estimate amplitude-phase error well.
出处
《现代雷达》
CSCD
北大核心
2011年第2期50-54,共5页
Modern Radar
基金
国家自然科学基金资助项目(61001209)
西安电子科技大学基本科研基金资助项目(JY10000902010)
关键词
微波稀布阵综合脉冲孔径雷达
发射阵
幅相误差
近场窄脉冲
远场直达波
microwave sparse-array SIAR
transmit array
amplitude-phase error
short range calibration based on narrow impluse
far range calibration based on direct-path wave
