Performance of L-SC receiver over K-fading channels

A closed form expression of the average bit error rate (ABER) and channel capacity have been derived for selection combining (SC) receiver considering an arbitrary number of diversity branches over K fading channels. The K fading model describes accurately composite multipath/shadowing fading channels which is a much more accurate model for real-world environments. A probability density function (PDF) based approach has been used to derive the ABER for different binary coherent and non-coherent modulation schemes and capacity of the system. The obtained analytical results are matched perfectly with the Monte-Carlo simulated results. The obtained expression can be used as a good tool to assess the performance of the diversity system over composite fading channels.