Bit error rate performance of π/4 DQPSK for Nakagami-lognormalchannels

A convergent infinite series has been presented for the bit error performance of /spl pi//4 DQPSK for Nakagami-lognormal channels if the fading figure m is an integer. The authors show that this infinite series can be replaced by a finite series. A convergent series for the BER is also derived when the fading figure, m, is real.