Abstract:

The high-precision radar target & simultaneous pulsed polarization measuring method requires high orthogonality of transmitting waveform. However， in practical applications， it is often difficult to transmit precise pulsed polarization measuring waveforms that meet the requirements of time width， bandwidth， and high orthogonality at the same time. A high-precision simultaneous pulsed polarization measuring method based on oblique projection filtering is proposed. Due to the nature of no orthogonality of the linear subspaces by oblique projection filtering algorithm， this method can obtain high-precision pulsed polarization measuring results with non-ideal orthogonal waveforms. Simulation results show that compared with the conventional simultaneous pulsed polarization measuring methods based on matched filtering， this method can reduce the amplitude and phase measurement errors of target polarization parameters and greatly improve the precision of simultaneous pulsed polarization measurement.

Key words: radar, polarization, oblique projection filtering, simultaneous pulsed polarization measurement, measurement accuracy, simulation verification

摘要：

高精度的雷达目标同时极化测量方法对于发射波形的正交性要求较高，然而实际应用中，发射同时满足时宽、带宽以及高正交性要求的精密极化测量波形往往非常困难。提出了一种基于斜投影滤波的高精度同时极化测量方法，利用斜投影算法中两线性子空间可以不相互正交的特点，能够在非理想正交波形的实际情形下，实现高精度的目标极化测量。仿真结果表明，相较于传统的匹配滤波同时极化测量方法，该方法可以大幅降低目标极化参量的幅度和相位测量误差，极大提高同时极化测量精度。

关键词: 雷达, 极化, 斜投影滤波, 同时极化测量, 测量精度, 仿真验证