Special up channel frequency deviation estimating method in code division multiplexing address system

A technology of frequency offset estimation and code division multiple access, applied in the direction of code division multiplexing system, multiplexing communication, transmission system, etc., can solve the problems of inaccurate frequency offset estimation, signal phase offset, frequency Inaccurate values ​​and other problems, to achieve the effect of reducing the amount of calculation, improving link performance, and eliminating the impact
CN1741395AInactive Publication Date: 2006-03-01ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2006-03-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for estimating frequency deviation of uplink special channel in CDMA system includes carrying out large dimension frequency deviation estimation then carrying out estimation for small dimension frequency deviation after calibration, using signal in special channel to remove off high frequency interference through low - pass filter and carrying out Fourier transform for partial data, carrying out mode sampling calculation on spectrum value for obtaining spectrum amplitude value being low -pass filtered, searching out frequency corresponding to data peak value.
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Description

Technical field:

[0001] The invention relates to a method for channel frequency offset estimation in a direct spread spectrum code division multiple access system in the field of wireless mobile communication, more specifically how to accurately perform frequency offset of an uplink dedicated channel in a wideband code division multiple access system (WCDMA) estimate. Background technique:

[0002] In the third generation mobile communication system, due to the influence of wireless transmission channel and radio frequency local oscillator error, there is a certain deviation between the carrier center frequency of the base station receiving signal and the radio frequency local oscillator frequency of the base station. The range of frequency deviation is generally around plus or minus 1000 Hz. If this frequency deviation is not compensated, the reception performance will be degraded. Therefore, we need to estimate the size of the frequency deviation and perform frequency devi...

Claims

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