DCTPSK--Differentially Detected Controlled Transition PSK

An efficient modem is introduced for system applications which favor differential detection techniques. In differentially detected controlled transition PSK (DCTPSK), pulse-shaping techniques are used to achieve bandwidth and power efficiency in nonlinear channels. The baseband waveshapes, eye diagrams, and signal space diagram of DCTPSK are given; its bit error rate performance is calculated and its power spectral density is obtained. In a multicarrier adjacent channel interference environment, the compact spectrum of DCTPSK enables it to utilize the available bandwidth and power more efficiently than some well-known modulation techniques such as DQPSK and DMSK.