Carrier Synchronization Method, Circuit, and System
AssigneeHuawei Technologies Co., Ltd.
InventorsLianfu Liu, Jun Ma
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Abstract
Embodiments of the present invention provide a carrier synchronization method, circuit, and system. 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. The variable n is a positive integer greater than or equal to 4.
Claims15
A carrier synchronization method, comprising:
- performing frequency multiplication on a received signal, the frequency multiplication being performed n times, wherein n is a positive integer greater than or equal to 4;
- performing narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the frequency multiplication has been performed n times;
- and
- performing frequency division on the signal obtained after the filtering and shaping, the frequency division being performed n times to restore a carrier signal.
A carrier synchronization circuit, comprising:
- an n times frequency multiplication unit, configured to perform frequency multiplication n times on a received signal, wherein n is a positive integer greater than or equal to 4;
- a filtering and shaping unit, configured to perform narrowband filtering at least twice and rectangular wave shaping at least twice on a signal obtained after the frequency multiplication;
- and
- an n times frequency division unit, configured to perform frequency division n times on a signal obtained after the filtering and shaping, to restore a carrier signal.
A carrier synchronization system, comprising:
- a demodulator;
- and
- a carrier synchronization circuit;
- wherein the carrier synchronization circuit, comprises:
- an n times frequency multiplication unit, configured to perform frequency multiplication n times on a received signal, wherein n is a positive integer greater than or equal to 4;
- a filtering and shaping unit, configured to perform narrowband filtering at least twice and rectangular wave shaping at least twice on a signal obtained after the frequency multiplication;
- and
- an n times frequency division unit, configured to perform frequency division n times on a signal obtained after the filtering and shaping, to restore a carrier signal;
- and
- wherein the demodulator is configured to receive a signal sent by a transmitting end, and demodulate the received signal according to a carrier signal obtained after phase shifting of a phase shifter.
Dependencies are inferred from the claim text.