Multi-frequency-band digital radio frequency far-pulling system and operating method thereof

Abstract

The invention discloses a digital video frequency remote system with a plurality of frequency bands. A multiplexing dividing and combining module is arranged in a base band unit in the system, so as to receive signals with a plurality of different frequency bands. On the transmission direction of the signals, a downlink chain and an uplink chain comprise analog down-conversion devices used for carrying out independent down-conversions to analog radio frequency composite signals of the affiliated chains according to the frequency bands to enable the signals to be formed into analog intermediate frequency composite signals; digital processing devices used for processing the analog intermediate frequency composite signals into base band signals and restoring into the analog intermediate frequency composite signals after data transmission is realized between the base band unit and a radio frequency remote unit; and analog up-conversion devices used for carrying out independent up-conversions to the analog intermediate frequency composite signals after the affiliated chains are restored according to the frequency bands to enable the analog intermediate frequency composite signals to beformed into the analog intermediate frequency composite signals in sequence. In addition, the invention discloses a work method of the system. The multi-frequency band digital video frequency remote system has the advantages that a single system performs the digital remote transmission function for various mobile communication system signals with different frequency bands, the networking is simplified, and the cost is saved.

Description

【Technical field】 [0001] The invention relates to the field of mobile communication digital radio remote systems, in particular to a multi-band digital radio remote system and a working method thereof. 【technical background】 [0002] In the mobile communication network, the digital remote radio system, as the extension and supplement of the base station in the coverage network, has increasingly become the main part of the coverage of the mobile communication network. [0003] The remote system generally includes a baseband unit adjacent to the base station and a remote radio unit adjacent to the antenna feeder system. The so-called adjacency means that they are physically located in a relatively close physical space, and the baseband unit and the remote unit are physically separated. On the other hand, it can have a relatively long distance, and the baseband unit can be used as the central node, and multiple radio remote units can be used to establish network topologies such...

AI Technical Summary

Problems solved by technology

[0008] However, the traditional digital remote radio system only handles mobile communication signals of one frequency band, such as GSM, WCDMA, DCS, etc. Any one channel, therefore, a mobile communication signal of one frequency band needs to be equipped with a set of corresponding single-band digital radio frequency In the case of mobile communication signals that need to cover multiple frequency bands at the same time, it is necessary to set up multiple digital radio remote systems of the above-mentioned single frequency band at the same time to meet the demand

[0009] Obviously, this method leads to the need for operators to use multiple sets of single-band digital radio remote systems to build mobile communication systems. In order to connect various corresponding systems, it will cause complexity in the structure and configuration of inter-system and inter-system connection equipment. It consumes a lot of optical fiber resources, occupies a large area, the engineering connection is messy, and the cost is high. It is not suitable for large-scale promotion and application.

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