Method and System for Pilot-Based Time Domain Phase Noise Mitigation for Coherent Receiver
AssigneeNEC Laboratories America, Inc.
InventorsDayou Qian, Ting Wang
Life of this patent
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Abstract
A method for phase noise mitigation for a coherent receiver in either an OFDM or single carrier based transmission system including applying a frequency offset and coarse phase noise compensation based on a radio frequency RF tone or using a phase lock loop PLL m-th power procedure, responsive to a signal from a digital signal processed transmission with an added pilots signal over an optical system, applying fine phase noise compensation based on comparison of the pilots signal in a time domain, removing the pilots, and demodulating the remaining pilotless signal.
Claims10
A method for phase noise mitigation for a coherent receiver in either an OFDM or single carrier based transmission system comprising the steps of:
- applying a frequency offset and coarse phase noise compensation based on a radio frequency RF tone or using a phase lock loop PLL m-th power procedure, responsive to a signal from a digital signal processed transmission with an added pilots signal over an optical system,
- applying a fine phase noise compensation based on comparison of the pilots signal in a time domain;
- removing the pilots;
- and
- demodulating the remaining pilotless signal.
A system for phase noise mitigation for a coherent receiver in either an OFDM or single carrier based transmission system, said system comprising:
- a frequency offset and coarse phase noise compensation based on a radio frequency RF tone or using a phase lock loop PLL m-th power procedure applied to a signal from a digital signal processed transmission with an added pilots signal over an optical system,
- a fine phase noise compensation based on comparison of the pilots signal in a time domain;
- a filter for removing the pilots;
- and
- a demodulator for demodulating the remaining pilotless signal.
Dependencies are inferred from the claim text.