摘要
L波段探空雷达在气象观测、航空导航等领域面临着复杂的噪声干扰问题,严重影响了目标检测精度和系统可靠性。本文基于信号处理理论,针对L波段探空雷达观测数据的噪声特性,设计了1套综合噪声抑制方案。该方案采用三级串联处理架构,包括基于改进谱减法的频域预处理、基于RLS算法的时域自适应滤波和基于Daubechies小波的多尺度精细化处理。通过对某型1675 MHz探空雷达系统6个月的实测数据验证,结果表明:综合方案在不同噪声环境下的信噪比改善达到8.5~15.2 dB,检测概率从62%提至89%,虚警率从15.8%降至3.2%,处理延迟控制在15 ms以内,为L波段雷达的业务化应用提供了有效的技术支撑。
L-band sounding radar faces complex noise interference issues in fields such as meteorological observation and aviation navigation,which seriously affect target detection accuracy and system reliability.Based on signal processing theory,this paper designs a comprehensive noise suppression scheme for the noise characteristics of L-band sounding radar observation data.The scheme adopts a three-stage cascade processing architecture,including frequency domain preprocessing based on improved spectral subtraction,time domain adaptive filtering based on the RLS algorithm,and multi-scale refinement processing based on Daubechies wavelets.Through the verification of six months of measured data from a certain 1675 MHz sounding radar system,the results show that the comprehensive scheme achieves an improvement in signal-to-noise ratio of 8.5-15.2 dB under different noise environments,with the detection probability increasing from 62%to 89%,the false alarm rate decreasing from 15.8%to 3.2%,and the processing delay controlled within 15 ms.This provides effective technical support for the operational application of L-band radar.
作者
吴林栋
Wu Lindong(Shanxi Provincial Meteorological Information Center,Taiyuan 030006)
出处
《气象水文海洋仪器》
2025年第6期79-81,85,共4页
Meteorological,Hydrological and Marine Instruments
关键词
L波段雷达
噪声抑制
信号处理
L-band radar
noise suppression
signal processing
