基于外照射源的无源雷达系统直达波对消技术研究

Research of Direct Signal Cancellation for External Illuminator Based Passive Radar

分析了外辐射源雷达系统中直达波信号的功率和对回波信号的影响,给出了基于自适应对消的直达波抑制方法。该方法结合自适应分数时延估计技术,提高了主通道与参考通道相关度,有效地对直达波进行抑制。最后通过实验仿真,验证了方法的可行性与有效性。

This paper analyzes the power of the direct path interference. It will make a great impact on the detec- tion of target echo signals. A solution based on adaptive interference cancellation is introduced for direct signal suppression. The correlation of the direct path and the indirect path is improved, which making use of the method based on adaptive fractional delay estimation. This method is better to suppress the direct signal. Finally, the sim- ulation results show this method has better preformance of target detection.