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Kalman filter for phase noise tracking

  • US 10,527,663 B2
  • Filed: 03/12/2015
  • Issued: 01/07/2020
  • Est. Priority Date: 03/12/2015
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • receiving, with a receiver, a signal;

    applying a backward phase noise correction estimate to the signal to produce a first intermediate signal;

    generating, with the receiver, a first decision regarding a transmitted value of a symbol in the first intermediate signal, wherein the first decision has a first variance between the transmitted value and the first intermediate signal;

    generating, with the receiver, a first forward phase noise correction estimate for the signal at a time t based on a second forward phase noise correction estimate for the signal at a prior time t−

    1 and the first variance; and

    updating, with the receiver, the backward phase noise correction estimate based on the first forward phase noise correction estimate, and the first decision regarding the transmitted value of the symbol to reduce the first variance.

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