The Error-control Technology And Its Application On The Wireless-Interface Of GSM Mobile Communication System

The quantity of mobile phone has had a great increase since GSM mobile communication system was put in use in China. Accordingly, it has formed a big market of the equipment for testing and repair . Because of the related foreign instruments' high price and difficult operation, it's hard for most testing personnel to use them conveniently. And at the same time, the testing equipments made by civil companies don't support the corresponding protocol of GSM, so the need of these personnel's can't be satisfied, either. Based on what I have mentioned above, The Wuhan University of Technology and Hubei Zhongyou Company empolder the Mobile Station Test Set which support all the related protocol of GSM900.In the GSM system, Error-control is the key-technology of the Wireless-Interface. Combining the Error-Control technology with the software and hardware, in the baseband transmit part of the GSM Mobile Station Test Set, I'll provide a module which can accomplish the physical layer's protocol of the Wireless-Interface., and the FEC technologies, such as cyclic code, convolutional code and Viterbi decode, can be achieved by the baseband module, too. By the cooperation of the baseband unit, center control unit and radio unit, the test set can provide the TDMA frame signals with which a call-link between test set and mobile phone will be set up. Having set up such a link, a lot of test for mobile phones' function, such as frequency quality, peak power and power level, will be accurately accomplished.