https://journals.tubitak.gov.tr/elektrik/vol25/iss2/48/
"Performance evaluation of simple CSRZ-QDPSK transmitter configurations" by RIMMYA CHITRAVELU and...
The performance of 1 and 2 Mach--Zehnder modulator (MZM)-based simple carrier suppressed return to zero differential quadrature phase shift keying (CSRZ-QDPSK)...
performance evaluation