Additional insights into F.S. Al-Qahtani et al. “Spectral efficiency of maximum ratio combining (MRC) over slow fading with estimation errors”

This correspondence gives additional insight on spectral efficiency of maximum ratio combining (MRC) over slow fading environments. One-dimensional results are extended and new 3-D results are reported. The main aims of this correspondence are:1.To re-derive the cumulative distribution function (cdf) and probability density function (pdf) of the average capacity of systems using MRC;2.To reveal additional insights into the behaviour of the capacity pdf by comparing the modified capacity pdf and the reported capacity pdf as functions of the capacity variable and various other parameters such as diversity order, channel fading gains and correlation coefficient in both 1-D and 3-D domains;3.To report additional and new simulation results on the average channel capacity in 3-D and to show the effects of diversity order, channel fading gains and correlation coefficient on the modified capacity and the reported capacity.