增益测量时可以将采样间距直接增大，亦可有效地获得所需的最大值。
In the gain measurement, the sample spacing can be enlarged directly, yet the required maximum remains unchangeable.
然后对窄带雷达回波采样序列进行相位匹配变换，搜索匹配函数的最大值，从而得到质心位置参数的估计值。
The phase matching transform is performed on the sample series. of narrow-band radar echo, and the centroid position parameter is estimated by searching for the maximum value of the matching function.
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