Modulation methods for PCNs
- 1 December 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Communications Magazine
- Vol. 30 (12) , 90-95
- https://doi.org/10.1109/35.210360
Abstract
The interference levels that may be expected for a range of conventional cellular and microcellular clusters used in personal communication networks (PCNs) and personal communication systems (PCSs) are discussed. Simulation results show that for conventional size cells, 32- and 64-level quadrature amplitude modulation (QAM) schemes are preferred for bit error rates (BER) above 1*10/sup -2/, while 4PSK or variable-rate QAM schemes are better for lower BER. For microcells with communications at both 900 MHz and 1.8 GHz, four- or six-cell clusters are advocated, depending on the SNR expected. Based on the expected signal-to-noise ratio (SNR) and interference levels, it is argued that variable-rate QAM schemes are superior to the other modulation schemes considered. For low BERs 4PSK may often provide the best performance, whereas for high BERs, particularly when the SNR is high, 32- and 64-level star QAM are the most suitable.Keywords
This publication has 4 references indexed in Scilit:
- Channel efficiency in digital cellular communication systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- QAM: the modulation scheme for future mobile radio communications?Electronics & Communication Engineering Journal, 1992
- Bandwidth efficient QAM schemes for Rayleigh fading channelsIEE Proceedings I Communications, Speech and Vision, 1991
- Spectrum efficiency in cellular (radio)IEEE Transactions on Vehicular Technology, 1989