Method for seeking GSM-R interference source

Abstract

The present invention provides a searching method of GSM-R interference source, belonging to the technical field of digital mobile communication special for tdma, since the interference source of GSM-R mainly includes frequencies of uplink 885-889MHz and downlink 930-934MHz used for China mobile, aiming at the characteristics, an Okumura-hata model structure mathematical model widely used for radio wave propagation is used to process search of the interference source. The invention has advantages of simple operation, convenient operation, quick location to the interference source, overcoming the fault of slow search speed of present interference source search; fit for multiple topographic conditions, searching the interference sources of six topographic conditions such as urban districts of small and medium-sized cities, outskirts of small and medium-sized cities, opening environment of small and medium-sized cities, urban districts of big cities, outskirts of big cities and opening environment of big cities.

Description

technical field [0001] The present invention relates to a kind of GSM-R (Railway Special Mobile Communication System) interference source search method, more specifically, relate to a kind of GSM-R communication system based on Okumura-hata (Okumura-Hata) electric wave propagation model The invention relates to an interference source search method, which belongs to the technical field of time division multiple access dedicated digital mobile communication. Background technique [0002] The mobile communication system can be divided into frequency division multiple access, time division multiple access and code division multiple access mobile communication according to the multiple access method; it can be divided into special mobile communication and public mobile communication according to the service scope; it can be divided into analog mobile communication according to the signal form and digital mobile communications. [0003] Railway dedicated mobile communication is i...

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Problems solved by technology

[0007] For the analysis of the above interference location methods, we found that method 1 requires network BSIC data or received signal spectrum data. For the research subject of this paper, it is mainly interference assessment and location before network construction, so there is no relevant BSIC information. The method is not applicable; for method 2, network-related planning data is also required. Although the frequency clearing of GSM-R before network construction is mainly aimed at the interference of China Mobile’s GSM shared frequency band, China Mobile’s network planning data cannot be obtained, and only through testing can be found. , so this method is not applicable to our

Method 3 gradually locates the interference signal by using the directional antenna test. This method is time-consuming, laborious and inefficient, and does not make full use of the propagation characteristics of radio waves.

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