【摘要】 针对激光回波脉冲窄、弱等缺点,提出数字信号处理技术检测目标的方法;该方法首先采用小波阈值去噪方法对激光回波弱信号进行滤波,然后利用激光回波信号之间的相关性,对滤波后的潜在目标进行目标匹配,检测出目标,整个系统采用高速数字信号处理器(DSP)实现相应的算法,采用现场可编程逻辑门阵列(FPGA)设计接口电路,降低了电路的复杂度;实验结果表明,该处理方法不仅提高了激光测距的作用距离和测距精度,而且实现了激光测距仪的小型化。更多还原

【Abstract】 Digital signal processing method is presented to detect target,because laser echo pulse is narrow and weak.Laser echo pulse is filtered by the method of wavelet threshold denoising and potential targets are gotten, then potential targets are matched by using correlation of laser echo pulses,in which the matched target is just true target.Digital signal processing method enhances effecTive range and measurement precision of laser ranger.High-speed DSP(Digital Signal Processor) is adopted in this system in order to provide fundament for real-time implement of digital signal processing algorithm.Meanwhile FPGA(Field Programmable Gate Array) is used to design interface circuit,which reduces circuit complexity and implement of miniaturization of laser ranger.更多还原