Symbol timing deviation estimation method for radio communication system

A symbol timing and symbol technology, applied in the field of DRM system, can solve problems such as symbol timing offset estimation failure

Inactive Publication Date: 2008-01-09
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] (2) There are too many IDFT lengths
If this happens, it will cause the symbol timing offset estimation to fail

Method used

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  • Symbol timing deviation estimation method for radio communication system
  • Symbol timing deviation estimation method for radio communication system
  • Symbol timing deviation estimation method for radio communication system

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Embodiment Construction

[0066] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0067] The basic idea of ​​the symbol timing offset estimation method of the present invention is to make full use of all OFDM symbol information in a complete gain pilot pattern, while traditional method 2 only uses a single OFDM symbol information each time. For the method of the present invention, its channel frequency response sequence can be expressed as:

[0068] H ^ i , k 3 = Σ i i + Q - 1 H ^ i , k 2 , k = 0,1 , ...

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Abstract

The invention is concerned with the symbol timing migration method in the radio communications system, which the method includes: to confirm the channel frequency response of the opposite known pilot frequency point of each of the received symbol; to conduct combining to each of the symbol to form the perfect pilot frequency; to complete combination of each of the symbol and to obtain the timing migration value of the symbol by using the channel frequency response value constructs the frequency response of the channel.

Description

technical field [0001] The invention relates to a symbol timing offset estimation method of a radio communication system, which is especially suitable for a DRM system. The method has a larger estimation range and a smaller error estimation probability. Background technique [0002] The DRM system (World Digital Radio Broadcasting System) is a new type of digital wireless broadcasting system, and it is the only general-purpose non-patented digital radio broadcasting system in the short-wave, medium-wave and long-wave AM broadcasting bands. Under the same coverage conditions, the power of the DRM transmitter is 6-9dB lower than that of the traditional analog transmitter, and the same-adjacent frequency protection rate of digital broadcasting is lower than that of analog broadcasting. It has strong anti-multipath interference ability and is convenient for mobile reception; the sound quality can reach CD or FM stereo quality; can provide additional data and multimedia informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 陈晨朴范镇魏立军
Owner BEIJING SAMSUNG TELECOM R&D CENT
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