Generalized CPM and DPM: digital angle modulation schemes with improved bandwidth efficiency

Author

Dzung, Dacfey ; Braun, Walter R.

Author_Institution

Asea Brown Boveri Corp. Res., Baden, Switzerland

Volume

38

Issue

11

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

1971

Lastpage

1979

Abstract

In digital angle modulation schemes the carrier is frequency modulated (continuous phase modulation) or phase modulated (digital phase modulation) by a waveform that is conventionally generated from the data sequence by a linear filtering operation. The concept is generalized by allowing a nonlinear dependence of the modulating signal on the data, making it possible to produce a signal with a narrower spectrum. The design procedure for the waveform is demonstrated for a signal with minimum out-of-band power. It is shown that the increase in bandwidth efficiency can be achieved without compromising the power efficiency of the signal

Keywords

frequency modulation; phase modulation; CPM; DPM; bandwidth efficiency; continuous phase modulation; digital angle modulation schemes; digital phase modulation; nonlinear filtering; waveform design procedure; Bandwidth; Chirp modulation; Continuous phase modulation; Digital modulation; Nonlinear filters; Phase modulation; Pulse modulation; Pulse shaping methods; Shape; Transmitters;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.61479

Filename

61479