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Method and device for phase noise estimation

A phase noise and phase difference technology, applied in the field of communication, can solve the problem of low accuracy of phase noise

Active Publication Date: 2016-09-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among them, the constellation points are often affected by Gaussian white noise when they are transmitted on the channel between the receiving end and the transmitting end, making the estimated phase noise less accurate

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  • Method and device for phase noise estimation
  • Method and device for phase noise estimation
  • Method and device for phase noise estimation

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] In the embodiment of the present invention, the transmitting end performs QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) modulation according to the constellation diagram, the constellation diagram includes a plurality of first constellation points, and then transmits the constellation diagram through the channel between it and the receiving end The first constellation point in , where the constellation point will be affected by phase noise and / or white Gaussian noise when transmitted on the channel between the transmitter and the receiver, so that the phase and / or amplitude of the constellation point may be shifted The receiving end receives the second constellation point from the channel between it and t...

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Abstract

The invention discloses a phase-noise estimation method and device and belongs to the field of communication. The method includes: acquiring a sample area in a constellation diagram used by a transmission end and the sample area includes a reference constellation point which is a first constellation point preassigned in the constellation diagram; acquiring a variance of white gaussian noises of second constellation points, received by a receiving end and acquiring sample points which are the second constellation points in the sample area; estimating according to the sample points, the reference constellation point and the variance of the white gaussian noises and acquiring a variance of phase noises of the second constellation points. The device includes a first acquisition module, a second acquisition module and an estimation module. The phase-noise estimation method and device enable estimation precision of the phase noises to be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for estimating phase noise. Background technique [0002] In modern wireless communication systems, in order to meet the needs of multimedia communication services, it is necessary to provide high-quality and high-speed data transmission on a limited frequency band. At present, high-order quadrature amplitude modulation can be used to provide more High quality and higher rate data transmission. [0003] However, high-order modulation leads to an increase in the density of constellation points, which makes the receiving end less tolerant to phase errors and is very sensitive to phase noise. Among them, the phase noise of the constellation points received by the receiving end can be estimated, and then based on the phase noise and Use techniques such as carrier recovery or phase compensation to reduce the phase noise level of the constellation points received ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/02
Inventor 迪米特里·里亚布科夫刘坤鹏严茜弗拉基米尔·伊万诺夫
Owner HUAWEI TECH CO LTD