Precoding Techniques for Nonlinear Constant-Envelope Modulations
Nonlinear constant envelope digital modulation schemes are attractive in applications where high power efficiency is required. When used in high-rate, band-restricted applications, intersymbol interference (ISI) results and must be compensated to obtain satisfactory error performance. Tomlinson-Harashima precoding has proven attractive in applications with linear modulations such as that in the V.34 standard for high-rate wireline modems. This article presents new results on techniques for precoding of nonlinear constant envelope modulations and their performance analysis in additive noise and fading channels. Substantial performance improvement is obtained over systems without precoding and systems with the Tomlinson type of precoding.
KeywordsNetwork Security Convolutional Code Input Symbol Continuous Phase Modulation Error Rate Performance
Unable to display preview. Download preview PDF.
- B. Lyons et al., “A Transmission System for Future Satellite Mobile and Personal Communications”, Final Report, ESTEC Contract NO. 11515/95/NL/US, 1997.Google Scholar
- S. Crozier, “Design and Performance of Precompensated Frequency Modulation (PFM) for use with a QuasiSynchronous CDMA Return Link”, International Mobile Satellite (IMSC’97), Pasadena, California, June 16–18, 1997.Google Scholar
- S. Crozier, B. Mazur and L. Erup, “Design of a Synchronous CDM Forward Link and a Quasi-Synchronous CDMA Return Link for Future Satellite-Based Mobile and Personal Communication Systems”, International Mobile Satellite (IMSC’97), Pasadena, California, June 16–18, 1997.Google Scholar
- A. Trachtman, I. Kalet and S. Shamai (Shitz), “Limiterdiscriminator Detection of Continuous Phase Modulation (CPM) — Tomlinson Filtering”, IEEE Trans. on Commun., vol. COM-42, pp. 819–825, Feb./Mar./Apr. 1994.Google Scholar
- M. A. Low and P. H. Wittke, “Precoding Techniques for Nonlinear Constant Envelope Modulations”, Proc. 4th CDMA International Conf., Seoul, Korea, Vol.II, pp. 143–147, September 1999.Google Scholar
- M. A. Low and P. H. Wittke, “Precoded Nonlinear Constant Envelope Modulations”, Proc. 1998 URSI International Symposium on Signals, Systems and Electronics, Pisa, Italy, pp. 349–355, September 1998.Google Scholar
- S. N. Crozier, “Precompensated Frequency Modulation (PFM) Designed for p/4-shifted QPSK Receivers”, Proc. 18th Biennial Symposium on Communications, Queens University, Kingston, Canada, 1996, pp. 343–346.Google Scholar
- S. N. Crozier, “Precompensated Frequency Modulation (PFM)”, U.S. Patents: 5,579,342, Nov.26, 1996, and 5,638,404, June 10, 1997.Google Scholar
- D. C. Lay, Linear Algebra and its Applications, Addison-Wesley Publishing Co. Inc., Reading, 1994, p.434.Google Scholar
- M. A. Low, “Performance of Precoded Constant-Envelope Modulation for Mobile Communications”, M.Sc. Thesis, Queen’s University, Kingston, Canada, Dec. 1997.Google Scholar