In the other, we use the particular attributes of zero-crossings as constraint in coarse matching, which can improve the matching speed.
另一方面，使用过零点的特有属性作为粗匹配的匹配约束，可以提高匹配速度。
2
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
The algorithm of measuring zero-crossings can better solve the problems that the characteristic parameters of the pulse signal are complicated in the time field and the measuration errors are greater.