基于相位编码的稀布阵综合脉冲孔径雷达的脉冲压缩性能分析

PERFORMANCE ANALYSIS OF PULSE COMPRESSION USING PHASE-CODED SIGNALS FOR SPARSE-ARRAY SYNTHETIC IMPULSE AND APERTURE RADAR

稀布阵综合脉冲孔径雷达(SIAR)采用多个频率信号同步全向照射工作方式,通过脉冲综合可以获得一定的脉压比。根据其距离模糊函数知,距离分辨率仅取决于发射信号带宽,增大发射信号的时宽带宽积则存在距离栅瓣效应。为此本文利用相位编码调制各阵元的发射信号,讨论其脉冲压缩性能。结果表明:这时不仅可以大大提高脉压比,而且可以降低距离旁瓣,同时可以满足SIAR对各向同性照射的要求。从而有利于提高其作用距离和距离分辨能力.

Sparse-array Synthetic Impulse and Aperture Radar (SIAR) can isotropically radiate by employing multiple frequencies (synthetic pulse) and multiple antennas (synthetic antenna). The range resolution only depends on bandwidth of transmitting signals. The distance grating lobes emerge in the case of increasing time-bandwidth product of transmitting signals. The performance of pulse compression is analyzed with the transmitting signals modulated by phase-coded sequences. The great ratio of pulse compression and range sidelobe suppression in SIAR are obtained, and its effective range and range resolution are raised.