Digital processing system and method applied to repeater of global system for mobile communication (GSM) frequency hopping network

Abstract

The invention discloses a digital processing system and a digital processing method applied to a repeater of a global system for mobile communication (GSM) frequency hopping network. The method comprises the following steps that: a base-band processing module converts a frequency hopping signal of a source base station into a constant frequency signal, arranges the constant frequency to each idle timeslot of a broadcast control channel carrier frequency frame structure, and forwards the constant frequency signal to a covered user area by utilizing broadcast control channel carrier frequency; or the base-band processing module rearranges the data of each timeslot of the broadcast control channel carrier frequency frame structure, converts the data into the constant frequency signal, converts the constant frequency signal into the frequency hopping signal, and forwards the frequency hopping signal to the source base station. According to the digital processing system and the digital processing method applied to the repeater of the GSM frequency hopping network, a normal service of a user is ensured, and the requirement of a multi-carrier frequency signal of the repeater for the high linearity of power amplifiers of the repeater is lowered; and when the broadcast control channel carrier frequency is used for transmitting information, only a slave power amplifier of the repeater is required to be started, so that equipment power consumption is reduced, and the energy-saving requirements of the repeater are met.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a repeater digital processing system and method applied to a GSM frequency hopping network. Background technique [0002] As traditional mobile access network equipment, GSM repeaters can be used to extend the coverage of base stations, and have been widely used in mobile network construction. With the advancement of technology, the output power level of repeaters has been continuously improved. At present, the maximum output power of new repeaters can reach 80W. However, the negative effects of high-gain and high-power repeaters are also very obvious. The most prominent problem is Higher requirements are put forward for the linearity of the power amplifier and the power consumption of the equipment increases sharply. For the consideration of both environmental protection and economy, domestic operators have put forward clear work efficiency requiremen...

AI Technical Summary

Problems solved by technology

However, this has brought new technical difficulties to the repeater with the base station signal as the source. Since the number of carrier frequencies used by the base station to participate in frequency hopping is often as many as a dozen, as long as there is a call service, no matter how large or small the number of users is, even Only one user calls, all carrier frequencies of the base station must work, and the corresponding repeater must also amplify all carrier frequency signals to ensure normal calls

The repeater is mainly used to extend the coverage of the base station. The coverage area of ​​the repeater is often remote villages, railways, highways, underground parking lots and other coverage blind areas. The wireless environment is very clean, and frequency hopping technology is not required to reduce interference. If It just transparently forwards the base station signal. In this case, the GSM repeater will only use the high-power main power amplifier to work. For this problem, in the GSM network with frequency hopping enabled, the energy-saving function of the repeater is useless; at the same time, when multiple carrier frequencies are working and amplifying at the same time, serious intermodulation interference is likely to occur, and the number of carrier frequencies of the working signal The more, the more intermodulation products, the higher the interference level. In this case, the GSM repeater is easy to become a new source of interference in the mobile network. In severe cases, it will not only interfere with its own communication system, but also affect other adjacent Communication system, so operators have strict requirements on the intermodulation attenuation of repeater products, but in the GSM network with frequency hopping enabled, it is actually difficult for existing repeaters to meet the intermodulation attenuation index requirements

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