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Frequency Offset Estimation and Compensation Method

A compensation method and frequency offset estimation technology, applied in the direction of baseband system components, etc., can solve problems such as slow estimation speed, high algorithm complexity, and impact on system pilot resource overhead, so as to improve the efficiency of carrier frequency offset estimation and save costs Effect

Inactive Publication Date: 2017-07-28
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned solution 1 needs to send additional pilot symbols, thereby affecting the overhead of system pilot resources; the above-mentioned solution 2 needs to perform channel estimation first, which will lead to the problems of high algorithm complexity and slow estimation speed

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The core idea of ​​the present invention is to iteratively update and estimate the carrier frequency deviation by using the primary and secondary synchronization signals and using the synchronization signal to assist the closed-loop carrier synchronization scheme. In this way, no additional pilot overhead is generated, and channel estimation is not required, so the carrier frequency offset estimation efficiency of the LTE system can be effectively improved, and system resource overhead can be saved.

[0018] Before the method process of the present invention is described in detail, at first the invention principle of the present invention is set forth as follows:

[0019] According to the TD-LTE system specification, a radio frame ...

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Abstract

The invention discloses a frequency offset estimation and compensation method. The method utilizes main and auxiliary synchronous signals and adopts the synchronous signals to assist a closed-loop carrier to carry out iteration update estimation on carrier frequency offset in a synchronous manner. According to the frequency offset estimation and compensation method, extra pilot frequency overhead does not be produced, and channel estimation is not needed, so that carrier frequency offset estimation efficiency of an LTE system can be effectively improved, and overhead of system resources can be saved.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a frequency offset estimation and compensation method. Background technique [0002] The OFDM system converts high-speed serial data into low-speed parallel data transmission, converts frequency selective channel into frequency flat fading channel, overcomes intersymbol interference (ISI) brought by high-speed data communication, and improves communication system transmission performance, so the next generation Transmission schemes based on OFDM technology are widely used in mobile communications. However, the transmission system based on OFDM technology also has some technical difficulties that need to be overcome. These difficulties include: the peak-to-average ratio of the OFDM system is high, and the OFDM system is sensitive to the system carrier frequency deviation and sampling frequency deviation. The OFDM system is sensitive to the frequency offset of the system carrier,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 金奕丹
Owner POTEVIO INFORMATION TECH CO LTD