Performance analysis of realistic multipath modeling using a multiple detail-level approach in cognitive communication systems

In this paper, the performance of an existing Multiuser Wireless Communication System is analyzed using accurate site specific propagation modelling data (such as path gain, angle of arrival/departure and delay spread) of a typical urban environment. For optimal utilization of realistic temporal, spectral and spatial data, obtained from the available ray-tracing tools, a novel multiple detail-level adaptive cognitive communication system is proposed. Desirable system performance in terms of bit-error rate and capacity is shown to be achievable using only AoA and path gain information of as little as 5 paths in generating the channel matrix. As a result, significant savings (85%) in computational cost are achieved, thus emphasizing the potential practical implementation of the proposed approach in cognitive communication applications.