Keywords

digital communications, modulation

Abstract

This paper compares three candidate detection techniques for shaped offset QPSK (SOQPSK-TG) and Feher's QPSK (FQPSK-JR) modulations which are embodied as fully interoperable modulations in the Interrange Instrumentation Group standard IRIG-106. The techniques are based on a common trellis-coded modulation representation and a common continuous phase modulation (CPM) representation for these two modulations. In addition the pulse amplitude modulation (PAM) decomposition of the common CPM representation is developed. All three techniques achieve near-optimal bit error rate performance. The PAM-based detector offers the best performance-complexity trade-off.

Original Publication Citation

Tom Nelson, Erik Perrins, and Michael Rice. "Near Optimal Common Detection Techniques for Shaped Offset QPSK and Feher’s QPSK," IEEE Transactions on Communications, Vol. 56, No. 5, May 2008. 724-735. DOI: 10.1109/TCOMM.2008.060155