Digital repeater with frequency hopping function and method for achieving synchronous frequency hopping

Abstract

The invention relates to a digital repeater with a frequency hopping function and a method for achieving synchronous frequency hopping. The digital repeater has a baseband signal processing function. The invention can demodulate broadcast channel information of a base station, extract frequency allocation situation of a cell and frequency hopping strategy information, and calculate frequency words according to a GSM frequency hopping algorithm to provide the frequency words to a digital frequency synthesizer of a frequency-selecting module of a digital up / down frequency conversion module, thereby achieving the synchronous frequency hopping with the base station. Thus, the invention can determine the number of the frequency-selecting channels of the operation based on the extracted number of carrier frequency, and intelligently closes redundant frequency-selecting channels; as the synchronous frequency hopping, the invention can not conduct two-way amplification on unused frequency points in a signal time slot, thereby further inhibiting background noise, intermodulation interference and the like and avoiding that the repeater is introduced to result in the low noise promotion of abase station system.

Description

technical field [0001] The present invention relates to a digital repeater and a method for realizing synchronous frequency hopping, in particular to realizing synchronization with the system by demodulating the broadcast control channel of the GSM cellular mobile communication system in view of the feature of the GSM mobile communication system having a frequency hopping function frequency hopping. Background technique [0002] As an important part of the mobile communication system, the repeater plays a very important role in the network optimization and signal coverage of the mobile communication system. The technology of the digital repeater has also attracted more and more attention. However, the introduction of the repeater also increases the background noise; compared with the base station, the repeater has uplink and downlink noise, and the uplink noise has a greater impact on the network system. The background noise is related to the communication bandwidth. The wi...

AI Technical Summary

Problems solved by technology

The repeater cannot intelligently switch the frequency selector according to the situation of the base station

[0007] ② All N frequency selectors are in working condition, the equipment bandwidth cannot be further reduced, and the noise floor cannot be further reduced

[0010] Compared with the analog frequency-selective repeater, the digital frequency-selective repeater does not need multiple frequency-selection modules, as long as one digital frequency selector can replace multiple frequency-selection modules of the analog repeater, and it is convenient to configure , but the above three defects in the analog repeater still cannot be solved, that is, the channel frequency point cannot be intelligently adjusted according to the base station frequency hopping strategy and carrier allocation strategy, and further optimization cannot be made in suppressing background noise and intermodulation interference

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