Phase Estimation Method and Apparatus for Polarization Multiplexing System
AssigneeHuawei Technologies Co., Ltd.
InventorYuanda Huang
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Abstract
A phase estimation method and apparatus for a polarization multiplexing system, where the method includes performing, by a receive end, state of polarization (SOP) rotation on a received first SOP signal and second SOP signal according to an angle of previous SOP rotation, extracting a pilot using adaptive filtering, and performing carrier phase estimation according to the extracted pilot. This prevents a noise signal from being extracted and can make a carrier phase estimation result more accurate.
Claims20
A phase estimation method for a polarization multiplexing system, comprising:
- performing, by a receive end, state of polarization (SOP) rotation on a received first SOP signal (Xin) and a second SOP signal (Yin) according to an angle of previous SOP rotation;
- extracting, by the receive end, a pilot (Z2) using adaptive filtering;
- and
- performing, by the receive end, carrier phase estimation according to the Z2, and
- wherein the Xin and the Yin are orthogonal polarization signals.
A phase estimation apparatus for a polarization multiplexing system, comprising:
- a memory comprising instructions;
- and
- a processor coupled to the memory, wherein the instructions cause the processor to be configured to:
- perform state of polarization (SOP) rotation on a received first SOP signal (Xin) and a second SOP signal (Yin) according to an angle of previous SOP rotation;
- extract a pilot (Z2) using adaptive filtering;
- and
- perform carrier phase estimation according to the extracted Z2, and
- wherein the Xin and the Yin are orthogonal polarization signals.
Dependencies are inferred from the claim text.