Published in Osborne, W., & Kopp, B. (1992). Synchronization in M-PSK modems. IEEE International Conference on Communications, 1992. ICC 92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications, v.3 1436-1440. doi: 10.1109/ICC.1992.268109 ©1992 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.


In many applications, it is economical for a single modem to receive multiple modulation formats. In particular, the use of BPSK and QPSK has become a defacto standard in many military and NASA systems. However, there is significant interest in employing 8PSK and 16PSK modulation in these same systems today in order to conserve bandwidth.

This paper addresses a technique for achieving carrier synchronization for all four of these PSK schemes in a single modem. This is accomplished by using quadrature channel carrier recovery processing and a version of the MAP phase detector algorithm. A model for the simulation of this tracking process is derived and results are presented to confirm its functionality.