Performance of Multiuser TAS/MRC Systems with a High Selection Gain in Severe Fading Channels

This paper investigates the performance of multiuser Transmit Antenna Selection / Maximal Ratio Combining (TAS/MRC) systems with a high selection gain in severe Nakagami-m fading channels. First, the amount of fading (AF) is derived as closed-form expressions for integer m. For arbitrary m, the AF is expressible as a single infinite series of Gamma function. The analytical results lead to the following observations. Regardless of high selection gain, the AF decreases in weak fading as expected. However, the outage performance can exhibit that the severe Nakagami-m fading results in positive effect on the performance of multiuser TAS/MRC systems with a high selection gain.