This thesis investigates the performance analysis of a non-coherent Binary Frequency Shift Keying (BFSK) receiver using Selection Combining techniques over a frequency non-selective, slowly fading Nakagami channel. These techniques are independent of the number of diversity branches, so simpler receivers can be employed. First order selection Combining (SC), second order Selection Combining (SC-2) and third order Selection Combining (SC-3) techniques are evaluated and compared to each other. Numerical results show that the performance improves as the order of Selection Combining techniques increases.http://archive.org/details/performancenalys1094532770NAHellenic Navy author.Approved for public release; distribution is unlimited.