针对微小卫星测控应答机的体积、重量及其功能灵活性，研究了接收机载波恢复环的实现方法。

The implementation method of the receiver carrier recovery loop of microsatellite affects the volume, weight and function reconfigurability of the transponder.

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本文研究全数字接收机中的同步技术，重点是MPSK信号的载波频偏和相位误差的估计和恢复算法。

This thesis deals with the synchronization technologies for all digital receiver, particularly carrier offset estimation for MPSK signal.

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本文着重研究全数字QAM接收机中载波恢复环路的设计，采用快慢两个数字环路来进行载波恢复。

The design of the carrier recovery loops in an all-digitized QAM receiver is investigated and two cascaded digital carrier recovery loops are proposed.

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