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A method for improving pilot signal detection performance in navigation/communication integration

A technology of pilot signal and pilot channel, which is applied in the directions of multiplexing communication, code shifting or jumping, electrical components, etc., can solve problems such as the degradation of pilot channel detection performance, and achieve the effect of reducing cross-correlation interference

Active Publication Date: 2021-07-02
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the cross-correlation interference of the data channel to the pilot channel makes the detection performance of the pilot channel decrease

Method used

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Embodiment Construction

[0012] The specific implementation manner of the present invention will be described in detail below in conjunction with the technical solutions.

[0013] A method for improving pilot signal detection performance in navigation / communication integration, comprising the following steps:

[0014] (1) Let the signal D with a length of 1023 and the local signal P be correlated. The length of the pseudo-random sequence is 1023, the signal D is sent by the data channel, and the signal P is sent by the pilot channel, and D and P are composed of pseudo-random sequences of the same family and different codes.

[0015] (2) The array Q stores the value of the cross-correlation function after the correlation operation.

[0016] (3) Set a threshold value where α=2.

[0017] (4) Find the elements in Q that are greater than K and record their corresponding position numbers in the array as array Z, find out the elements in Q that are less than -K and record their corresponding position num...

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Abstract

A method for improving the performance of pilot signal detection in navigation / communication integration. Firstly, let the signal D with a length of N and the local signal P do a correlation operation, and the cross-correlation function value after the correlation operation is stored in the array Q. Secondly, set a threshold value to find out the elements in Q that are greater than K and record their corresponding position numbers in the array as array Z, find out the elements in Q that are less than -K and correspond to their position numbers in the array Record it as an array F. Finally, when the pilot signal sends data bit 1, the signal D sent on the data channel is cyclically shifted by k bits to form a CCSK signal as a data signal, where the value of k is selected from Z; when the pilot signal sends data bit When 0, the signal D sent on the data channel is cyclically shifted by k bits to form a CCSK signal as a data signal, where the value of k is selected from F. The invention selects the number of cyclic shifts of the data signal so that the positive / negative autocorrelation peak of the pilot signal just superposes with the positive / negative cross-correlation peak of the data signal, thereby reducing the cross-correlation interference of the data channel to the pilot channel.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to navigation / communication integration, and in particular to a method for improving pilot signal detection performance in navigation / communication integration. Background technique [0002] In the navigation / communication integrated design based on Cyclic Code Shift Keying (CCSK), the pilot signal and the data signal are superimposed and transmitted, and the data signal is modulated by CCSK technology. The cross-correlation interference of the data channel to the pilot channel degrades the detection performance of the pilot channel, thereby affecting the detection performance. Compared with the original technology, the present invention has the advantage of selecting the number of cyclic shifts of the data signal, so that the positive / negative autocorrelation peak of the pilot signal is just superimposed on the positive / negative cross-correlation peak of the data signal, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00
CPCH04J13/0003H04J13/0074
Inventor 李欣玥邹德岳刘鑫赵楠
Owner DALIAN UNIV OF TECH