Cochannel interference computation for arbitrary Nakagami fading

A characteristic function method is used to calculate the probability that the signal-to-interference ratio (SIR) drops below some predefined threshold (probability of outage). The mobile unit receives a desired signal which has undergone Nakagami (1960) fading and multiple, cochannel, and independent Nakagami interferers. The development is based on a technique due to Bealieu (1990). The advantages of the method are twofold. First, it places no integral restriction upon the Nakagami fading parameter. Second, it avoids the evaluation of higher order derivatives (residues).