Multifrequency minimum shift keying
Abstract
A new modulation scheme, called multifrequency minimum shift keying (MF MSK), is proposed which is capable of producing a constant envelope continuous phase signal set with a compact power spectrum and power efficiency better than that of MSK. The scheme is based on the quadrature-carrier multiplexing of two frequency/phase modulated signals of the type NFSK/2PSK, both with the same frequency in each transmision interval and with sinusoidal symbol shapes, and referred to as multifrequency minimum shift keying (MF MSK). Particular attention is given to modulation, demodulation, and synchronization circuits, and the spectral properties and power efficiency on the AWGN channel. The scheme combines such features as constant envelope, power efficiency, continuous phase with a rapid falloff of the power spectrum, and self-synchronization capability which makes it attractive for a variety of applications, particularly on nonlinear and fading channels and digital satellite links.
- Publication:
-
IEEE Journal on Selected Areas in Communications
- Pub Date:
- October 1992
- Bibcode:
- 1992IJSAC..10.1243F
- Keywords:
-
- Frequency Shift Keying;
- Multiplexing;
- Quadratures;
- Signal Processing;
- Phase Shift Keying;
- Power Efficiency;
- White Noise;
- Communications and Radar