IMPACT OF THE POWER DELAY PROFILE SHAPE ON THE BIT ERROR RATE IN MOBILE RADIO SYSTEMS

In this paper, typical power delay profiles (PDP's) are simulated usin g different digital modulation schemes in order to study the influence of the PDP shape on the bit error rate (BER) performance of terrestri al mobile radio communication systems, Therefore, a multitap channel m odel with Rayleigh and lognormal fading is proposed, which is used for a software simulation, The simulation is focused on the investigation of typical details of the PDP as peaks, slope, attenuation, and dista nce of a second group of waves, This yields information about the prop erties, which have essential effects on the BER. Two of the most frequ ently applied types of modulation schemes, 0.3 GMSK (coherent detectio n) and pi/4 DQPSK, are considered.