Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor

A carrier frequency offset, communication system technology, applied in the field of communication, can solve the problems of inability to meet the communication system, low bit error rate index, etc., and achieve the effect of overcoming the impact, high SNR, and improving the range

Inactive Publication Date: 2007-06-13
HUAWEI TECH CO LTD
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Problems solved by technology

For multi-carrier systems, this will introduce ICI, which cannot meet

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  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor
  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor
  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor

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[0068] In order to make the objectives, technical solutions and advantages of the present invention more clearly expressed, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0069] The main idea of ​​the present invention is: firstly, the received synchronization pilot sequence is zero-filled in the time domain at the receiving end, and the Fourier transform is performed on the zero-filled synchronization pilot sequence to obtain frequency domain oversampling of the synchronized pilot sequence ; Then on the frequency domain oversampling spectrum of the synchronized pilot sequence, the sum of the power spectrum amplitudes of the subcarrier sequences with the same frequency interval is calculated according to the interval of the single-frequency pilot signal to obtain the measurement sequence, where the calculated subcarriers The interval of the carrier signal corresponds to the interval between th...

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Abstract

The method includes following procedures: receiving synchronizing pilot sequence, and obtaining oversampling in frequency domain for synchronizing pilot sequence; on discrete frequency spectrum of oversampling in frequency domain in synchronizing pilot sequence, calculating square of amplitudes of discrete frequency spectrum lines, and summarizing them in order to obtain measure sequence; based on measure sequence to carry out estimation for carrier frequency shift. The invention increases precision of estimating carrier frequency shift, and range of estimation remarkably without increasing complexity.

Description

technical field [0001] The present invention relates to the technical field of communication, more specifically, a method, a device and a system for estimating carrier frequency offset in a communication system. Background technique [0002] At present, Global System for Mobile Communications (GSM) and Code Division Multiple Access Mobile Communication System (CDMA) have been widely used all over the world, while Wideband Code Division Multiple Access Mobile Communication System (WCDMA) and Wideband Code Division Multiple Mobile communication systems such as Multiple Access Mobile Communication System 2000 (CDMA2000) have also been applied to a certain extent within a certain range. Orthogonal frequency division multiplexing (OFDM) technology has the ability to resist inter-symbol interference (ISI) and can provide high spectral efficiency, so it is regarded as one of the most likely transmission technologies for the next generation of wireless mobile communication systems. ...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 杨学志孙卫军杜高科
Owner HUAWEI TECH CO LTD
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