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A method for reducing interference of GSM direct end uplink noise on base station

A repeater, noise technology, applied in the direction of transmission noise suppression, communication between multiple stations, electrical components, etc., can solve the increase in call drop rate and bit error rate, restrict the application and development of repeaters, and reduce donors Base station coverage and other issues to achieve the effect of suppressing interference

Inactive Publication Date: 2008-01-09
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Summary
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AI Technical Summary

Problems solved by technology

However, since the repeater is an active device, its own uplink noise will be introduced into the donor base station, thereby reducing the receiving sensitivity of the receiver of the donor base station, reducing the coverage of the donor base station, and even causing serious call drop rates and increase in bit error rate
This problem restricts the application and development of the repeater and has not been resolved

Method used

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  • A method for reducing interference of GSM direct end uplink noise on base station

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Embodiment Construction

[0016] specific implementation

[0017] The accompanying drawings and embodiments herein introduce the method by taking the GSM four-carrier frequency wireless repeater as an example. This method is applicable to repeaters of any type and any number of carrier frequencies.

[0018] Fig. 1 is the realization scheme of the present invention in GSM repeater (taking four carrier frequency equipment as example), this scheme realizes in the uplink of repeater, is the uplink part of repeater among the figure, The downlink of the repeater is the same as the traditional repeater.

[0019] As shown in the figure, the uplink radio frequency link is composed of radio frequency connection line 1, amplifier 2, radio frequency connection line 3, four-carrier frequency selective detection module 4, radio frequency connection line 5, amplifier 6, and radio frequency connection line 7; the feedback control link It consists of a four-carrier frequency selective detection module 4, four signal ...

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Abstract

The method features the following: in the repeater uplink, the radio signals are separated based on frequency point; making power detection for each separated signal frequency point signal; converting each route RF signal into a DC envelope signal; according to the GSM physical layer protocol, the control unit makes sampling judgment for each route envelop signals to decide if each channel is occupied; if yes, then opening the uplink; if not, then cutting off the uplink or attenuating the gain of uplink in order to suppress the uplink noise guided into the base station.

Description

technical field [0001] The invention relates to a method for reducing the interference caused by the uplink noise of a repeater to a donor base station. This method is applicable to the GSM mobile communication network that has not opened the frequency hopping function. Background technique [0002] GSM is a technical standard with the most extensive application, the largest network scale and the largest number of users in the second generation mobile communication system. It uses time-division multiple access (TDMA) technology, which forms a matrix on the frequency-time relationship, and each channel corresponds to a point on its frequency-time matrix. [0003] The GSM mobile communication repeater is actually a two-way signal amplifier, which plays the role of extending the coverage of the base station and filling the blind. As a signal relay device, the repeater provides better signal coverage. However, since the repeater is an active device, its own uplink noise will ...

Claims

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Application Information

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IPC IPC(8): H04Q7/30H04B7/26H04B15/00
Inventor 喻志刚甘洪文王志勇孟祥志
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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