【作者】 曲承志； 张艳； 焦中兴；

【Author】 Qu Chengzhi;Zhang Yan;Jiao Zhongxing;Sun yat-sen university;

【机构】 中山大学；

【摘要】 在GM-APD激光测距系统中,目标回波信号的提取精度是影响系统探测能力的关键因素,然而传统信号提取方法易受噪声影响,当采样次数受限时难以在低信噪比环境中实现目标回波信号的有效提取。针对该问题,本文提出一种基于位置关联的自适应管道约束数据处理方法,该算法通过结合目标的空间相关性和回波信号的时间相关性,建立约束管道去除回波中的异常噪声数据,完成低信噪比环境中目标回波的提取。通过实测数据进行实验,其结果表明所提出的方法可在低信噪比、少采样次数情况下实现目标回波的精确提取。更多还原

【Abstract】 In the Geiger mode Avalanche Photodiodes(GM-APD) laser ranging system,the extraction accuracy of target echo signal is a key factor for system detection ability.However,the traditional signal extraction method is susceptible to noise,and it is difficult to extract target echo signal effectively in a low SNR environment when the sampling times are limited.To solve this problem,an adaptive pipeline constraint data processing method based on location correlation is proposed.By combining the spatial correlation of the target and the temporal correlation of the echo signal,a constraint pipeline is established to remove the outliers in the echo data,and the target echo signal can be extracted in a low SNR environment.The experimental results show that the proposed method can accurately extract the target echo under the condition of low SNR and few sampling times.更多还原