Apparatus and method for correcting phase error
AssigneeMStar Semiconductor, Inc.
InventorsKai-Wen Cheng, Yi-Ying Liao, Tung-Sheng Lin, Tai-Lai Tung
Life of this patent
Estimating the term…
Abstract
An apparatus for correcting a phase error is provided. The apparatus includes an error estimating module and a correcting module. The error estimating module receives a phase-shift keying signal, and calculates a phase error according to the phase-shift keying signal, a plurality of known candidate signals and Bayesian estimation. The correcting module corrects the phase-shift keying signal according to the phase error.
Claims12
A phase error correcting apparatus, applied to a phase-shift keying communication system, the apparatus comprising:
- an error estimating module, for receiving a phase-shift keying signal comprising an original signal and a noise signal, and calculating a phase error caused by the noise signal according to the phase-shift keying signal and a plurality of candidate signals using Bayesian estimation;
- wherein the original signal represents one of the plurality of candidate signals;
- and
- a correcting module, for correcting the phase-shift keying signal according to the phase error,
- wherein the error estimating module associates a quadratic of a difference of the original signal and an estimated signal corresponding to the phase-shift keying signal to a Bayesian risk, and calculates the phase error toward minimizing the Bayesian risk, in a way that a phase difference of the corrected phase-shift keying signal and the original signal is minimized.
A phase error correcting method, applicable to a phase-shift keying communication system, the method comprising:
- a) receiving a phase-shift keying signal comprising an original signal and a noise signal;
- b) calculating a phase error caused by the noise according to the phase-shift keying signal and a plurality of candidate signals using Bayesian estimation, wherein the original signal represents one of the candidate signals;
- and
- c) correcting the phase-shift keying signal according to the phase error,
- wherein step (b) comprises associating a quadratic of a difference of the original signal and an estimated signal corresponding to the phase-shift keying signal to a Bayesian risk, and calculating the phase error toward minimizing the Bayesian risk, in a way that a phase difference of the corrected phase-shift keying signal and the original signal is minimized.
Dependencies are inferred from the claim text.