Precise Outage Analysis of Selection Diversity and Switched Diversity in Bandlimited Micro-Cellular Systems With Cochannel Interference

Precise outage probability performance analysis of a micro- cellular system with selection and switched diversities is considered. The micro-cellular system is assumed to follow a flat slow Nakgami/Raleigh fading model wherein the fading channels from the desired transmitter to all the receiver antennas are independent and identically distributed Nakagami channels, and all the fading channels for the interfering signals are independent, identically distributed Rayleigh channels. Three selection and switching criteria, namely, desired signal power, signal-to-interference power ratio and total output power are considered. Unlike previous results, the system model under investigation takes into account the pulse shaping and the random delays and phase offsets of the interfering users. Two Nyquist pulse shapes, spectrum-raised-cosine and Beaulieu–Tan–Damen pulse shapes are considered. Analytical outage probability expressions derived for an arbitrary number of interferers, arbitrary diversity order and arbitrary value of desired user fading parameter. The outage performance of the selection criteria are compared. The optimum switching thresholds for different switching criteria are formulated.