Global system for mobile communication (GSM) repeater and self-adaption interference cancellation method thereof

Abstract

The invention discloses a global system for mobile communication (GSM) repeater and a self-adaption interference cancellation method thereof, comprising a donor antenna, an overlay antenna, a radio frequency module, a digital down-conversion module, a digital up-conversion module, a self-adaption interference cancellation module, a physical layer processing module and a high layer processing module. The physical layer processing module and the high layer processing module are connected with the self-adaption interference cancellation module through a parallel data line and a serial control line. The self-adaption interference cancellation module is respectively connected with the digital down-conversion module and the digital up-conversion module through a serial data and a control line. The radio frequency module is respectively connected with the digital down-conversion module and the digital up-conversion module through a SAM port, and the radio frequency module is connected with the donor antenna and the overlay antenna. In the invention, communication channels between a base station and a mobile station are detected, and narrow-band self-adaption interference cancellation algorithm is carried out on the communication channels, thereby the occurrence of self-excitation is reduced, interference among a plurality of repeater equipment can not occur, and the complexity of installation and debugging of equipment is simultaneously reduced.

Description

Technical field: [0001] The invention relates to an adaptive interference cancellation technology in the field of wireless relay, in particular to a technology for selectively amplifying and forwarding uplink and downlink signals in GSM communication, and simultaneously using a narrowband adaptive interference cancellation method to eliminate self-excitation problems, belonging to The field of wireless communication. Background technique: [0002] The repeater is a wireless relay device mainly used in areas where the base station signal is too weak to enhance the signal. Amplifying and forwarding base station signals through repeaters can effectively expand base station coverage and fill coverage blind spots. At the same time, the repeater is a duplex repeater with two-way transmission, one way receives the signal of the base station, and forwards it to the mobile station after being amplified; the other way receives the signal of the mobile station, and forwards it to the ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a new method for solving the cell coverage problem different from the traditional GSM repeater. Firstly, the communication signal between the base station and the mobile station is received, and the communication signal between the base station and the mobile station is determined by analyzing the signaling. Communication channels, and then only narrowband adaptive interference cancellation method on these channels can eliminate the self-excitation problem and reduce interference

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