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Adaptive location method and device of autocorrelation sequence

A positioning method and self-adaptive technology, applied in the directions of synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of inability to modify, increase equipment cost and complexity, and achieve low possibility of misjudgment, low implementation cost, and reduced The effect of bit error rate

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AI Technical Summary

Problems solved by technology

The positioning methods disclosed above all have certain practicability, but all have the following deficiencies: most of the methods put forward requirements on signal coding and modulation, such as adding pilot signals, or adding a second known pattern, which It can only be used in special equipment such as transceivers produced by the same manufacturer. For equipment produced in accordance with industry standards, the equipment manufacturer cannot modify the standard coding and modulation methods; in addition, if multiple signal taps or multiple correlator approach, which also increases the cost and complexity of the device

Method used

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  • Adaptive location method and device of autocorrelation sequence
  • Adaptive location method and device of autocorrelation sequence
  • Adaptive location method and device of autocorrelation sequence

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Embodiment Construction

[0030] Such as figure 1 As shown, the steps of the positioning method of the present invention are as follows:

[0031] Receive the signal sequence from the previous stage and store it;

[0032] According to the composition of the signal and the possible transmission deviation, determine the possible position range of the received signal, and perform a correlation operation on the known adaptive sequence and the signal sequence;

[0033] Shift the entire sequence in the range of possible positions and repeat step 2 until all possible positions have been calculated with correlation values.

[0034] Step 2: According to the characteristics of the received signal and the transmission channel, the range of the correlation peak width is known.

[0035] First set the search window width to the initial value, including the following steps:

[0036] place the search window at the beginning of the sequence of correlation values,

[0037] Calculate the modulus sum of the correlation...

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Abstract

The invention relates to a method and a positioning device for locating a known autocorrelation sequence in a received signal in digital communication, including an input signal storage, a correlator, a correlation value sequence storage, a search window controller and a correlation peak searcher ; The input signal storage stores the received signal sequence, the correlator correlates the known adaptive sequence with the received sequence, shifts successively to obtain a correlation value sequence, and saves this sequence in the correlation value sequence storage , the search window controller controls the width of the search window, judges the reliability and stores the search results, the controller outputs the search results, and the correlation peak searcher stores the information in the correlation value sequence memory according to the search window width given by the search window controller The largest and second largest correlation peaks are searched in the stored correlation value sequence; the present invention can effectively deal with the problem of finding the position of the autocorrelation sequence under the condition of multipath, and has the characteristics of accurate positioning and small possibility of misjudgment.

Description

technical field [0001] The present invention relates to a method for locating an autocorrelation sequence in a signal in a digital communication system, in particular to a method for locating a known autocorrelation sequence in a received signal in a digital wireless communication. The positioning device of the method described above. Background technique [0002] In a digital communication system, it is necessary to insert a known sequence with good autocorrelation characteristics into the transmitted signal, so that the receiver side can locate the received information. This positioning method is used in wireless communication and other Widely used technology in the field of communication; the positioning method can be simply described as using the known autocorrelation sequence to perform successive shift correlations with the received unknown sequence, and determine the position of the autocorrelation sequence in the unknown sequence by looking for the largest correlatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/00
Inventor 张睿
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