Title :
A spectrally efficient constant envelope modulation technique for PCS and mobile communications
Author :
Guo, Yanpeng ; Feher, Kamilo
Author_Institution :
Dept. of Electr. Eng., California Univ., Davis, CA, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
A newly developed constant envelope FQPSK modem/radio architecture, which employs a modified double-jump (DJ) filter in the cross-correlated FQPSK system, is proposed for personal communications systems (PCS) and mobile radio applications. Power efficiency, spectrum efficiency, BER, and system capacity of this system are investigated in a non-linear amplified (NLA) Rayleigh fading environment. We demonstrate that with the simplest threshold detectors (binary robust eye diagrams in I and Q channels), this system is 4-7 dB more power efficient than the US digital cellular and Japanese Handyphone standard π/4-QPSK, 50%-100% more spectrally efficient than the European standard GMSK, and it almost double the capacity of GMSK
Keywords :
fading; filtering and prediction theory; frequency allocation; mobile radio systems; modems; personal communication networks; phase shift keying; radiowave propagation; signal detection; BER; FQPSK modem/radio architecture; I channels; PCS; Q channels; binary robust eye diagrams; constant envelope modulation; cross-correlated FQPSK system; double-jump filter; mobile communications; mobile radio applications; nonlinear amplified Rayleigh fading; personal communications systems; power efficiency; spectrum efficiency; system capacity; threshold detectors; Bit error rate; Detectors; Digital communication; Filters; Fluctuations; Land mobile radio; Mobile communication; Personal communication networks; Rayleigh channels; Telephone sets;
Journal_Title :
Broadcasting, IEEE Transactions on
