作者: Tho Le-Ngoc , K. Feher , Hiep Pham Van
DOI: 10.1109/TCOM.1982.1095365
关键词: Intersymbol interference 、 Mathematics 、 White noise 、 Phase-shift keying 、 Additive white Gaussian noise 、 Electronic engineering 、 Bandwidth (signal processing) 、 Minimum-shift keying 、 Spread spectrum 、 Jitter
摘要: New power and bandwidth efficient modulation techniques, named intersymbol interference jitter-free (IJF)-QPSK IJF-OQPSK, are presented. The properties of the IJF-QPSK IJF-OQPSK signals in linear nonlinear earth-station-satellite systems studied. A finite-state Markov chain model is used to calculate spectra hard-limited IJF-OQPSK. provides insights into spectral spreading action ideal hard-limiter on signals, Experimental, simulation, theoretical results good agreement. indicate that modulated signal exhibits much less spectrum than QPSK, OQPSK, MSK. error probability (P e ) performance IJFOQPSK an additive white Gaussian noise adjacent-channel environment evaluated. show P superior MSK narrow-band channels.