Spectral characteristics of digital phase-modulated signalsThe power spectral density of two-level digital phase modulated signals is determined using various polar pulse shaping functions, the only restriction being that the pulses are independent and do not overlap. Rectangular pulses and pulses having finite rise and decay times are considered. It is shown that a substantial improvement in terms of minimizing spectral occupancy on a power basis over a given frequency band can be achieved by using linear and raised cosine pulse shaping functions. Further, the rate of decrease of the power spectral density is given for the asymptotic limit as f goes to infinity. The use of these and possibly other well chosen pulse shaping functions can then provide an additional aid to overall efficient spectrum utilization and management.
Document ID
19770032347
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Mcgregor, D. N. (Operations Research, Inc. Silver Spring, Md., United States)
Miller, J. E. (NASA Goddard Space Flight Center Greenbelt, Md., United States)