Mobile communication repeater system applying digital intermediate frequency mode

Abstract

The invention discloses a mobile communication direct amplifying station with digital intermediate frequency. Wherein, transforming the down signal into analog intermediate frequency signal with RF module to send to ADC / DAC group and transform into digital intermediate frequency signal by A / D; extracting and filtering with digital down converter, and secondary transforming into baseband signal to send to baseband treatment unit for packaging into serial data as given frame format; transferring with optical fiber to high-speed digital optical fiber transceiver on cover end to de-frame with baseband treatment unit and send into ADC / DAC group; filtering and interpolating with digital up converter, transforming into analog intermediate frequency signal by D / A converter; finally, taking frequency conversion with RF module into RF signal and sending to opposite over area. The remote machine sends received up signal of mobile terminal with said inverse process to receiving end of base station. This invention avoids intrinsic leakage and dc offset in prior art.

Description

Technical field [0001] The invention relates to a mobile communication repeater series adopting a new signal processing mode, in particular to a mobile communication digital optical fiber repeater system adopting a digital intermediate frequency mode. Background technique [0002] The mobile communication repeater plays a very important role in the network optimization and signal coverage of the mobile communication system. The digital repeater technology has also attracted more and more attention. However, if the frequency conversion is still performed in the analog part, the system uses a large number of analog It is difficult for the device to fully achieve the balance of I / Q amplitude and phase, thus affecting the performance of the system. In addition, in the current communication market, on the one hand, multiple second-generation mobile communication systems coexist and still play an important role; on the other hand, new standards are constantly being formulated, but...

AI Technical Summary

Problems solved by technology

[0002] The mobile communication repeater plays a very important role in the network optimization and signal coverage of the mobile communication system. The digital repeater technology has also attracted more and more attention. However, if the frequency conversion is still performed in the analog part, the system uses a large number of analog It is difficult for the device to fully achieve the balance of I / Q amplitude and phase, thus affecting the performance of the system

In addition, in the current communication market, on the one hand, multiple second-generation mobile communication systems coexist and still play an important role; on the other hand, new standards are constantly being formulated, but they cannot completely replace existing standards.

Its existing system has many standards, old and new systems coexist, and the development of communication technology is changing with each passing day. big pressure

Due to the limitations of the technical system, the traditional repeater system is difficult to meet the many needs of the current mobile communication system in the field of network optimization and signal coverage

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