摘要
激光雷达回波信号去噪是回波信号有效检测的基础。分析了激光雷达回波信号中的噪声来源和统计特性;采用非抽样小波变换和Hybird软阈值对回波信号进行了去噪处理,对处理后信号中残余的"毛刺"进一步做了平滑滤波,处理后的信噪比提高了20.55dB。利用Gage高速采集卡和LabVIEW编程环境中开发的软件实现了对激光雷达回波信号检测。
Denoising is the basis of effective detection for lidar echo signal.First,We have analyzed the noise sources and statistical properties of the lidar echo signal,the echo signal is denoised by the undecimated wavelet transform and the method of Hybird soft threshold.The signal to noise ratio has improved by 20.55 dB after further processing,which is used smoothing filter for removing residual ＂glitches＂ in the signals.The detection for echo signal of lidar has been achieved with the software platform,which is developed by Gage high-speed acquisition card and LabVIEW programming environment.
出处
《国外电子测量技术》
2012年第5期52-55,共4页
Foreign Electronic Measurement Technology
关键词
小波去噪
虚拟仪器
激光雷达
信号处理
非高斯噪声
wavelet denoise
virtual instrument
lidar
signal processing
non-Gaussian noise
