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A Turbo method for eliminating trainning sequence

A training sequence, pseudo-random sequence technology, used in multiplexing communications, orthogonal multiplexing systems, error correction/detection using convolutional codes, etc.

Inactive Publication Date: 2004-09-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
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Problems solved by technology

The use of methods that directly superimpose training sequences has significant limitations

Method used

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  • A Turbo method for eliminating trainning sequence
  • A Turbo method for eliminating trainning sequence
  • A Turbo method for eliminating trainning sequence

Examples

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Embodiment Construction

[0054] The main innovation of the present invention is to introduce the variable estimated coefficient weighted training sequence, and adopt the method of circular processing to eliminate the noise introduced by the training sequence.

[0055] According to the method described above, the interference elimination of the Turbo method can be realized by programming, and then corresponding hardware can be made by using the existing technology to form the module of the present invention, so as to eliminate the training sequence superimposed on the data signal in wireless communication.

[0056] The following examples illustrate:

[0057] Suppose ρ=0.05, N=4096, threshold Γ=0.1, K=128, then ρ = 0.2236 , 1 - ρ = 0.9747 .

[0058] Among them, at the transmitting end 23: the data sequence C[k] of 4096 points transformed by IFFT 3 in O...

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Abstract

The invention provides a turbo method for eliminating train series; it eliminates the train series superimposed in the received signal through the receiving end according to the channel estimation value in each loop process and train series eliminating weight number which increases along with the improvement of estimation precision, at the same time, using the character of strong autocorrelation of train series, carries on correlation calculation to the processed data and local generated similar train series. The invention can eliminate the train series superimposed in the signal effectively according to the demands of communication system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication or wired communication, and particularly relates to the technology for eliminating the training sequence superimposed on the data signal. Background technique [0002] The development trend of modern mobile communication is to require faster transmission rate, better transmission quality, higher spectrum efficiency, and larger system capacity in a multipath environment, so OFDM has become a technology that has attracted much attention. In order to achieve synchronization, channel estimation, etc. at the receiving end, it is necessary to superimpose training sequences in the signal data at the sending end. There are two methods of superimposing training sequences commonly used at present, including time-division superposition (frame structure shown in Figure 1) and direct superposition (frame structure shown in Figure 2). The spectrum utilization rate of time-division superposition ...

Claims

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Application Information

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IPC IPC(8): H03M13/00H03M13/23H04J11/00H04L27/10
Inventor 唐友喜罗涛严春林李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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