• DOI:10.1109/GLOCOM.2005.1578470
• Corpus ID: 11020777

Common detectors for shaped offset QPSK (SOQPSK) and Feher-patented QPSK (FQPSK)

@article{Nelson2005CommonDF,
  title={Common detectors for shaped offset QPSK (SOQPSK) and Feher-patented QPSK (FQPSK)},
  author={Tom Nelson and Erik S. Perrins and Michael D. Rice},
  journal={GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.},
  year={2005},
  volume={6},
  pages={5 pp.-3747}
}

• T. Nelson, E. Perrins, M. Rice
• Published 2005
• Computer Science
• GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.

Symbol-by-symbol detection of SOQPSK and FQPSK using detectors designed for offset QPSK represents a simple common detector architecture for these two interoperable waveforms. Unfortunately, this detection method results in a 2 dB loss in bit error rate performance. This paper describes detection methods for recovering this loss without the need for knowing which modulation is used by the transmitter. An equivalent cross-correlated trellis-coded quadrature modulation (XTCQM) representation for SOQPSK is developed which forms the basis of a common TCM detector. An equivalent CPM representation for FQPSK is developed which forms the basis for a common CPM detector. The common XTCQM detector performs slightly better than the common CPM detector, but achieves this gain at the expense of higher complexity