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Channel residual frequency offset compensation method and system

A technology of residual frequency offset and compensation method, which is applied in the field of communication, and can solve the problems that the estimated result is larger than the accurate value, and the frequency domain frequency offset estimation error is large, etc.

Inactive Publication Date: 2020-02-28
上海欧科微航天科技有限公司
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Problems solved by technology

[0009] In the above frequency domain CFO estimation techniques and methods, since the channel estimation result H contains interference factors caused by residual frequency offset, the estimation result is larger than the accurate value
[0010] Therefore, a new channel residual frequency offset compensation method is needed, which can solve the problem of large frequency offset estimation errors in the current frequency domain

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  • Channel residual frequency offset compensation method and system
  • Channel residual frequency offset compensation method and system
  • Channel residual frequency offset compensation method and system

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Embodiment Construction

[0058] The advantages of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0059] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0060] The terminology used in the present disclosure is for the purpose of describing particular embodiments only, and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, the singular...

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Abstract

The invention provides a channel residual frequency offset compensation method and system, and the channel residual frequency offset compensation method comprises the following steps of calculating the channel estimation H of a subcarrier before a signal of a first symbol of a communication signal enters a channel; before the signal of the first symbol of the communication signal enters the channel, calculating a first phase offset and a first frequency offset epsilon1 of the first symbol based on the channel estimation H and the conjugate H * thereof; after the signal of the first symbol is outputted from the channel and before the signal of a second symbol enters the channel, calculating a mean value of the channel estimation of the second symbol which is not compensated for the first phase offset and the channel estimation of the second symbol, and calculating a second phase offset and a second frequency offset epsilon2 of the second symbol and a first correction coefficient based on the mean value and conjugation thereof; and correcting the second frequency offset epsilon2 by using the first correction coefficient and outputting the second frequency offset epsilon2. After the technical scheme is adopted, the accuracy of frequency domain CFO estimation can be improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a channel residual frequency offset compensation method and system. Background technique [0002] Carrier synchronization is an important part of satellite communication technology. In carrier synchronization technology, synchronization technology is a practical problem that any communication system must solve, and its performance is directly related to the performance of the entire communication system. Similarly, the OFDM system inevitably has problems such as carrier synchronization and symbol synchronization, and since each OFDM symbol is composed of N sample points, the OFDM system, in addition to the above-mentioned carrier synchronization and symbol synchronization in the digital communication system, also has Contains issues with sample synchronization. [0003] When using synchronous coherent demodulation and coherent detection, the receiving end needs...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2655H04L27/2672H04L27/2695
Inventor 尧勇仕陈长勇钱玉璧陈鸿键张梅马陆
Owner 上海欧科微航天科技有限公司
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