Effect of Phase Offset on the Probability of Error of Two Co-Channel MSK Signals

In this paper we derive exact mathematical expressions for the probability of error of minimum shift keying (MSK) in presence of a co-channel interferer. We show that the probability of error of MSK is highly dependant on the phase difference between the two signals and with proper phase offset the two signals are quasi-orthogonal. The mathematical expressions derived here are validated through Monte-Carlo simulations