Method and device for frequency offset estimation

A frequency offset estimation and frequency offset technology, applied in the field of communication, can solve the problems of large frequency offset, inaccurate frequency offset estimation value, affecting the normal operation of the communication system, etc., and achieve the effect of reducing the residual frequency offset

Active Publication Date: 2013-07-31
芯鑫融资租赁(厦门)有限责任公司
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Problems solved by technology

[0048] However, when the receiving end is moving at high speed (for example, when the mobile terminal user is taking a high-speed rail), due to the Doppler effect, the frequency offset is relatively large, which exceeds the frequency offset estimation range of the above frequency offset estimation method, resulting in the obtained frequency The estimated value of the offset is not accurate enough, which will affect the normal operation of the communication system, thus limiting the scope of use of the frequency offset estimation method

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  • Method and device for frequency offset estimation
  • Method and device for frequency offset estimation
  • Method and device for frequency offset estimation

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[0079] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0080]In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0081] In the prior art, when performing frequency offset estimation, in the calculation process of frequency offset estimation, it is necessary to make a hard decision on each of the M data after joint detection before and after the Midamble code. The premise of making a hard decision is that the phase rotation corresponding to the estimated frequency offset on the constellation diagram cannot exceed Only if the phase rotation does not e...

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Abstract

A method for frequency offset estimation comprises the following steps: firstly, obtaining to-be-estimated and to-be-compensated data; secondly, setting data volume, which is less than or equal to the maximum data volume of the data, of a frequency offset estimation; thirdly, performing the frequency offset estimation based on the data of the data volume to obtain frequency offset; fourthly, performing frequency offset compensation to the data based on the frequency offset to obtain data after compensation; fifthly, adding the data volume for the frequency offset estimation to the data after compensation and judging whether the added data volume is less than or equal to the maximum data volume of the data or not; sixthly, stopping the frequency offset compensation in case that the added data volume is greater than the maximum data volume; seventhly, repeating the steps from the third step to the fifth step based on the added data volume in case that the added data volume is less than or equal to the maximum data volume; and eighthly, outputting an accumulated value of various frequency offset results as a total frequency offset estimation value after the frequency offset estimation is stopped. The method and device can obtain a precise frequency offset estimation result while enlarging the application range of the frequency offset estimation.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a frequency offset estimation method and a frequency offset estimation device. Background technique [0002] The development of mobile communication technology has formed a variety of mobile communication networks, such as the Global System for Mobile Communication (GSM, Global System for Mobile Communication) in the second generation mobile communication system (2G, Second Generation), the third generation mobile communication system ( 3G, Third Generation) in Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronous CDMA, CDMA, Code Division Multiple Access), Wideband Code Division Multiple Access (WCDMA, Wideband CDMA), and TD-SCDMA and Long Term Evolution (LTE, Long Term Evolution) in the next generation mobile communication system of WCDMA, and Worldwide Interoperability for Microwave Access (WIMAX, Worldwide Interoperability...

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Application Information

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IPC IPC(8): H04B1/7105H04L25/02
Inventor 刘文明董霄剑
Owner 芯鑫融资租赁(厦门)有限责任公司
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