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WCDMA system access channel frequency deviation estimating method

A technology for access channel and frequency offset estimation, which is applied in the transmission system, baseband system components, electrical components, etc., can solve the problems of large consumption of hardware resources and inaccurate frequency offset estimation, and achieve improved reception performance and accurate frequency offset Effect

Inactive Publication Date: 2008-03-12
ZTE CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a WCDMA system access channel frequency offset estimation method, which overcomes the disadvantages of inaccurate frequency offset estimation and too large consumption of hardware resources in the prior art.

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  • WCDMA system access channel frequency deviation estimating method
  • WCDMA system access channel frequency deviation estimating method
  • WCDMA system access channel frequency deviation estimating method

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Embodiment Construction

[0043] The principle of the frequency offset estimation method of the present invention is as follows:

[0044] Assuming that the signal without frequency offset is S, then the signal with frequency offset is se j2πΔft , where Δf is frequency offset in Hz (hertz), and t is time in s (second). Suppose t1, t2 are two different moments, and S i = s e j 2 πΔf t i , use means S i The conjugate sign of , then

[0045] S 2 * S ‾ 1 = | S | 2 e j 2 πΔf ( t ...

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Abstract

The invention relates to a estimation method for access channel frequency off-set in WCDMA, which comprises following steps: 1. detecting the predecessor part of access channel signal without frequency off-set compensation to obtain multi-path position with maximal energy; 2. removing interference and sign to the data of said multi-path position, dividing result into some small segments; 3. taking coherent integration treatment to every segment data, calling the result as symbol; 4. calculating auto-correlation function of different data; 5. calculating estimation value of phase rotation angle of adjacent symbols; 6. calculating frequency off-set estimation value. This method increases precision and decreases consumption to hardware resource.

Description

technical field [0001] The invention relates to a frequency offset estimation method of an access channel of a wireless communication system, in particular to a frequency offset estimation method of an uplink access channel of a wideband code division multiple access (WCDMA) communication system. Background technique [0002] With the rapid development of mobile communication, people have higher and higher requirements for the quality of mobile communication and the types of services it provides. The proposal and development of the third generation of mobile communication is exactly in line with this demand of people, so it has attracted much attention. . Wideband Code Division Multiple Access (WCDMA) is a Radio Transmission Technology (RTT) solution proposed by the 3rd Generation Partnership Proiect (3GPP). It can not only provide high-quality voice services, but also provide Multimedia services similar to fixed networks. [0003] In the Wideband Code Division Multiple Ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04L25/02H04B1/707
Inventor 万里龙段勇杨奕
Owner ZTE CORP
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