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Method and device for computing correlation peak values

A technology of correlation peak value and calculation method, applied in the direction of multi-frequency code system, etc., can solve the problem that the clock frequency cannot calculate the correlation peak value, etc.

Active Publication Date: 2013-01-16
HAIER BEIJING IC DESIGN
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  • Summary
  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a correlation peak calculation method and device for the defects of the prior art, so as to solve the problem that the correlation peak cannot be calculated when there is a deviation in the sampling clock frequency

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  • Method and device for computing correlation peak values
  • Method and device for computing correlation peak values
  • Method and device for computing correlation peak values

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Embodiment Construction

[0045] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0046] image 3 It is a diagram of the corresponding relationship between OFDM symbols and correlation values ​​in the prior art. Such as image 3 As shown, when the sampling clock frequency has no deviation, use the formula The correlation value can be calculated, where R K Is the correlation value, Ng is the length of the guard int...

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Abstract

An embodiment of the invention relates to a method and a device for computing correlation peak values. The method includes determining offset according to sampling clock offset and the length of OFDM (orthogonal frequency division multiplexing) characters, computing first correlation values according to the offset and acquired data, and searching out the first correlation peak value from the first correlation values. Accordingly, by the method in the embodiment, the offset is added into a correlation value computing formula when offset exists in sampling clock frequency, and finally the correlation peak value can be computed.

Description

Technical field [0001] The present invention relates to the field of wireless digital communication, in particular to a method and device for calculating correlation peaks. Background technique [0002] Multi-carrier systems have the ability to combat multipath fading and high frequency utilization, and are widely used in the field of wireless digital communications. figure 1 It is a schematic diagram of a multi-carrier system model in the prior art, such as figure 1 As shown, when transmitting data, for the data sending end, firstly, the data is subjected to Inverse Fast Fourier Transform (IFFT). Secondly, in order to combat multipath delay, the data is often in the data after IFFT. Insert a guard interval (Guard Interval, GI), figure 2 It is a schematic diagram of inserting guard interval before OFDM symbol in the prior art, such as figure 2 As shown, in each OFDM (Orthogonal Frequency Division Multiplexing, OFDM) data block, data with a certain length at the tail is repeatedl...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 洪波
Owner HAIER BEIJING IC DESIGN
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