| 摘要 |
<p>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.</p> |
