第二种方法是使用一种有序的多波段发生器，这样可以更容易的匹配回波信号，但同时也更易受到干扰。
A second approach is to use a wide range of sequential frequencies; this is easier to match but more prone to interference.
根据三脉冲激光雷达回波信号的特点，对信号进行差分滤波和匹配滤波处理，信噪比提高约1.5倍；
According to laser radar echo characteristic, the difference filter and the match filter were adopted. As a result, the SNR is advanced about 1.5 times.
通过匹配追踪算法寻找与回波信号最匹配的基函数来确定脱靶量参数。
Miss distance parameters are estimated by matching pursuit algorithm to search the basis function which best matches the echo signal.
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