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发明授权
CN102812680B 载波同步方法、电路及系统 有权

载波同步方法、电路及系统
摘要：
本发明实施例提供一种载波同步方法、电路及系统，方法包括：将接收到的信号进行n倍频处理；对n倍频处理后得到的信号进行至少两次窄带滤波处理和至少两次方波整形处理；将经过滤波和整形处理后得到的信号进行n分频处理，以恢复出载波信号；其中，n为大于或等于4的正整数。电路包括：n倍频单元，用于将接收到的信号进行n倍频处理；滤波整形单元，用于对n倍频处理后得到的信号进行至少两次窄带滤波处理和至少两次方波整形处理；n分频单元，用于将经过滤波和整形处理后得到的信号进行n分频处理，以恢复出载波信号；其中，n为大于或等于4的正整数。系统包括解调器和载波同步电路。本发明实施例相比于现有技术减小了载波恢复的过度时间。
摘要（英）：

Embodiments of the present invention provide a carrier synchronization method, circuit, and system, where the method includes: performing n times frequency multiplication on a received signal; performing narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and performing n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The circuit includes: an n times frequency multiplication unit, configured to perform n times frequency multiplication on a received signal; a filtering and shaping unit, configured to perform narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and an n times frequency division unit, configured to perform n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The system includes a demodulator and a carrier synchronization circuit. Compared with the prior art, in the embodiments of the present invention, carrier restoration transition time is reduced.

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