Practical aspects of increasing the spectral efficiency of PSK-n-signals due to intersymbol symbol interference

摘要

The paper considers some practical aspects arising from the use of “transparency windows” (range of symbol time durations of information sequence when error probability per symbol due to intersymbol distortion is zero) to increase spectral efficiency in radio communication systems using multiposition phase-shift keyed signals with n discrete states. The functioning of communication systems was analyzed in the presence of frequency detuning and error produced by phase meter for various amplitude-frequency responses of a linear radio path. The admissible operating conditions and gains in information transfer rate of such systems are determined.