A NOVEL-APPROACH TO MODELING AND EFFICIENT SIMULATION OF FREQUENCY-SELECTIVE FADING RADIO CHANNELS

Today, multipath radio channel simulation is an indispensable means of evaluating radio links. In this paper, a novel simulator concept based on channel orthogonalization techniques in two inner product spaces is presented and compared to the conventional approach of modeling each individual Rayleigh or Rice fading multipath ray individually. The new simulator can be applied to linear amplitude/phase modulation and linear fading channels including Nyquist filtering. It is shown to be a good approximation to the conventional model in the case of tight rolloff factors. Channels having quasi- or truly continuous delay profiles can now be properly represented at significantly reduced computational complexity. Also, the new simulation concept leads to the lowest level of complexity being achieved for the prevailing channel and noise conditions on a particular channel.