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Method and device for suppressing phase noise

A phase noise and phase noise technology, applied in the field of communication, can solve problems such as phase noise value error, signal error, and poor suppression ability

Active Publication Date: 2021-12-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, only the phase noise value predicted by the historical signal is used to demodulate the current signal. Once the error of the predicted phase noise value is large, the error of the demodulated signal at the receiving end will be large.
That is to say, the phase noise suppression method in the prior art has poor suppression ability, which makes the accuracy of the received signal low

Method used

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  • Method and device for suppressing phase noise
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  • Method and device for suppressing phase noise

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Embodiment Construction

[0034] The application will be described in further detail below in conjunction with the accompanying drawings.

[0035] Embodiments of the present application provide a phase noise suppression method and device, which are used to improve the ability to suppress phase noise and improve the accuracy of received signals. Wherein, the method and the device of the present application are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

[0036] In the description of the present application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0037] In order to describe the technical solutions of the embodiments of t...

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Abstract

A phase noise suppression method and device are used to improve the suppression capability of phase noise and improve the accuracy of received signals. The method is as follows: multiple states of a symbol can be determined, phase noise estimation is performed on multiple states respectively to obtain the phase noise value corresponding to each state, and then the posterior probability of each state is obtained, and the maximum posterior probability is corresponding to The state of is used as the target to receive the signal. In this way, the suppression ability of the phase noise can be improved, and the accuracy of the received signal can be improved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a phase noise suppression method and device. Background technique [0002] In a communication system, after baseband processing and shaping of the signal at the sending end, the signal needs to be modulated to the required frequency range through up-conversion. Correspondingly, the signal needs to be down-converted to baseband at the receiving end. The up and down conversion operation is achieved by mixing with the carrier signal output by the oscillator. Ideally, the carrier signal is an ideal single-tone signal with a fixed frequency, so that the baseband signal can be accurately recovered after up-down conversion. However, due to non-ideal characteristics of the oscillator such as white noise and flicker noise, the phase of the carrier signal fluctuates indefinitely randomly. The random fluctuation of the phase is also equivalent to the instability of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2657H04L2027/0067H04L27/26
Inventor 张昌明蔡梦
Owner HUAWEI TECH CO LTD