A measurement method based on time-frequency representations for the qualification of GSM equipment

A digital method for testing and qualification of GSM equipment is presented. The method, based on the use of time-frequency representations, shows itself suitable to carry out most measurements needed for the characterization both of base stations and mobiles. It is possible to avoid the employment of different instruments, complex procedures, and qualified users. Some aspects regarding GSM measurements are first presented in order to clearly describe the operative stages of the method. Then, its performance is assessed by analyzing reference signals. Experimental results obtained from the application of the method to actual GSM signals are finally given