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Fast global system for mobile communications for railway (GSM-R) interference identification method

A GSM-R, interference identification technology, applied in the field of wireless communication, can solve problems such as manual detection of interference

Inactive Publication Date: 2013-03-27
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the above-mentioned problem of manually finding interference, the present invention provides a time-frequency combined GSM-R interference fast identification method

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  • Fast global system for mobile communications for railway (GSM-R) interference identification method

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with accompanying drawing:

[0062] Fast GSM-R interference identification method involved in the present invention, the functional block diagram of its hardware system is as attached figure 1 shown.

[0063] The DSP&ARM dual-core processor used in the system is the Da Vinci architecture OMAP-L138 processor, which requires a main frequency of at least 300MHz and an interference identification code on the board; the receiving range of the high-frequency receiving module should be able to cover the GSM-R frequency band, and the gain should be at least 40dB; the first-stage inverter can convert the signal into an intermediate frequency signal with a frequency of 70MHz; the programmable intermediate frequency filter should provide a programming interface with controllable filter bandwidth; the second-stage inverter can down-convert the intermediate frequency signal and output I / Q data; the A / D converter s...

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Abstract

The invention relates to a fast global system for mobile communications for railway (GSM-R) interference identification method and belongs to the field of wireless communication. The method specifically includes taking a signal sequence V composed of N GSM-R sampling data, subjecting the V to fast Fourier transform to obtain a frequency domain data sequence F, diving the F into two sequences of a communication signal sequence S and a bottom noise sequence D by means of a separation threshold value, calculating an average value of the bottom noise sequence D, judging whether a current bottom noise is interfered, subtracting data of the normalization communication signal sequence from corresponding data of a standard signal frequency domain template sequence Std to obtain a result, then subjecting the result to absolute value calculation to obtain a signal differential data sequence Sub 1, calculating a mutual correlation result sequence COV of the Std and the S, subjecting the Std to autocorrelation to obtain an autocorrelation result sequence AUT of the Std, subtracting each datum of the AUT from each datum of the COV to obtain a result, then subjecting the result to absolute value calculation to obtain a sequence Sub 2, and judging whether interference exists according to the Sub 1 and the Sub 2. Input / output (I / O) signal relates to two ways of digital intermediate frequency signals.

Description

technical field [0001] The invention relates to the GSM-R technology in the wireless communication field, in particular to a fast GSM-R interference identification method. Background technique [0002] GSM-R is a dedicated communication system based on GSM technology - railway integrated digital mobile communication system. Compared with the traditional GSM technology, in addition to providing a series of railway communication services, GSM-R can also ensure that trains can communicate with high reliability, high completion rate and high transmission quality at a speed of 500km / h. Safety and business reliability directly affect the future development of my country's railways and the development of the entire national economy. At the same time, due to the rapid development of radio communication in our country, the electromagnetic environment along the railway line has become very complicated, and there are various communication interferences. With the construction of high-s...

Claims

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Application Information

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IPC IPC(8): H04B17/00
Inventor 赛景波刘瑞褚丹丹刘杰李志敏佟秋薇刘霄谢标宿玲玲江继龙
Owner BEIJING UNIV OF TECH
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