本文提出了一种新的方法，多普勒外差法测量表面面形，并首次提出和制作了同步相位计。

This paper describes a new method, Doppler heterodyne measurement method of surface profile, using a simultaneous phase comparator.

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同步跟踪则由多径跟踪的结果精确估计PN序列码相位，并实时跟踪信道各径成分由于多普勒效应产生的时延漂移。

Following, code tracking confirm the PN code phase precisely and track every multipath component's delay drifting due to Doppler effect.

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同步跟踪则由多径跟踪的结果精确估计PN序列码相位，并实时跟踪信道各径成分由于多普勒效应产生的时延漂移。

Following, code tracking confirm the PN code phase precisely and track every multipath component's delay drifting due to Doppler effect.

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