An analytical solution for the BER of an individually optimal single cochannel interferer BPSK receiver

The exact bit error rate (BER) of a synchronous individually optimal receiver (IOR) used to detect a binary phase-shift keying (BPSK) signal distorted by a like-modulated signal and additive white Gaussian noise (AWGN) is derived. It is shown that the BER expression decomposes into the probability of error of BPSK in AWGN plus an interference term. It is observed that as the noise decreases the IOR performance approaches the performance of a single cochannel interferer jointly optimal receiver