Frequency deviation correcting system and method for WCDMA (wideband code division multiple access)

A technology of frequency offset correction and frequency offset, which is applied in the field of frequency offset correction system for WCDMA, can solve the problems of unsatisfactory requirements and low accuracy, and achieve the effect of easy reception demodulation and small frequency offset

Active Publication Date: 2012-12-19
ALLWIN TELECOMM
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Problems solved by technology

However, the traditional method of correcting frequency offset has low accuracy and cannot meet the requirements of systems with small frequency offset requirements.

Method used

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  • Frequency deviation correcting system and method for WCDMA (wideband code division multiple access)
  • Frequency deviation correcting system and method for WCDMA (wideband code division multiple access)
  • Frequency deviation correcting system and method for WCDMA (wideband code division multiple access)

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Embodiment Construction

[0036] Depend on figure 1 As shown, a frequency offset correction system for WCDMA, the system includes an input processing unit for processing radio frequency signals, and the input processing unit is sequentially connected with a frequency for rough frequency adjustment and fine adjustment of the input signal Offset correction unit and output processing unit. The frequency offset correction unit is realized by using FPGA.

[0037] As a further preferred embodiment, the frequency offset correction unit includes a down-conversion module connected to the output end of the input processing unit, and the output end of the down-conversion module is sequentially connected to a first filtering module, a signal extraction module, a main synchronization module, Frequency offset estimation module, interface module, first digital-to-analog conversion module, crystal oscillator and phase-locked loop, the output end of described phase-locked loop is connected to input processing unit and...

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Abstract

The invention discloses a frequency deviation correcting system and method for WCDMA (wideband code division multiple access). The system comprises an input processing unit, a frequency deviation correcting unit and an output processing unit. The method comprises the following steps of: acquiring a radio frequency signal by the input processing unit, and carrying out down-conversion and analog-digital conversion on the radio frequency signal; carrying out frequency deviation coarse adjustment and fine adjustment according to the radio frequency signal; and carrying out up-conversion and digital-analog conversion on the radio frequency signal according to a result of the frequency deviation coarse adjustment and fine adjustment, and sending out the radio frequency signal. According to the frequency deviation correcting system and method disclosed by the invention, frequency deviation correction of coarse adjustment and fine adjustment is carried out on the radio frequency signal, thus frequency deviation of the signal can be smaller, and receiving and demodulating on the signal can be realized more easily. The frequency deviation correcting system and method disclosed by the invention can be widely applied to the mobile communication field.

Description

technical field [0001] The invention relates to a mobile communication correction technology, in particular to a frequency offset correction system and method for WCDMA. Background technique [0002] There are two types of frequency offset, one is the inherent frequency difference between the local oscillator frequencies of the base station and the receiver, and the other is the frequency offset caused by the wireless channel between the base station and the receiver. However, the traditional method of correcting frequency offset has low accuracy and cannot meet the requirements of a system with small frequency offset requirements. Contents of the invention [0003] In order to correct the above two types of frequency offset well, the object of the present invention is to provide a frequency offset correction system for WCDMA that combines coarse correction and fine correction. [0004] The purpose of the present invention is to provide another frequency offset correction...

Claims

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Application Information

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IPC IPC(8): H04L25/03
Inventor 郝禄国杨建坡谢晓东余嘉池何仕杰杨舜君曾文彬
Owner ALLWIN TELECOMM
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