基于随机跳频信号的带通滤波器相位补偿

Phase compensation of band passes filters in frequency hopping signal

高频地波雷达工作频段存在着严重的电台干扰,尤其是夜间很难找到可用的寂静带宽。带通滤波器的应用使随机跳频信号可以充分利用非连续寂静窄频带,提高雷达系统的生存能力。本文研究了随机跳频信号体制下带通滤波器的设计方法,提出了对带通滤波后的数据进行相位补偿的方法,可有效降低信号的旁瓣电平。并通过实际电磁环境数据仿真验证了该方法的可行性。

Serious radio interferences are distributed in the operating frequency band of High -frequency surface -wave radar （HFSWR）, and it is difficult to find silent bandwidth especially at night, the application of band pass filters can make use of non-continuous silent bandwidth, which improved the viability of HF radar. Design methods for band pass filters of frequency hopping signal radar was studied in this paper. A method of phase compensation to the data after band pass filters was proposed, which lowered the signal sidelobe effectively. And the feasibility of the method was validated through actual electromagnetic environments data.