Continuous phase shift modulation system with improved spectrum

Details Continuous phase shift modulation system with improved spectrum Continuous phase shift modulation system with improved spectrum

1989-03-06

1990-01-30

Grimm, Siegfried H.

Modulators

Frequency shift keying modulator or minimum shift keying...

332103, 375 47, 375 64, H04L 2712, H04L 2720

Patent

active

048976202

ABSTRACT:
A continuous phase shift modulation system wherein, for each of the in-phase and quadrature components, adjacent half-cosine pulses of the same polarity are joined by a continuous transition modulation signal which maintains continuity of the waveform and at least its first derivative. When this occurs, the other component signal is adjusted to maintain constant the vector sum of the component signals.

REFERENCES:
patent: 4516087 (1985-05-01), Bruene
Nakajima et al, "Gaussian Filtered and Amplitude Limited MSK", Transactions of the IECE of Japan, vol. E64, No. 11, Nov. 1981, pp. 716-723.
F. Amoroso, "Pulse Spectrum Manipulation in MSK Format", IEEE Trans. Commun., Mar. 1976, pp. 381-384.
F. Amoroso, "The Use of Quasi-Bandlimited Pulses in MSK Transmission", IEEE Trans. Commun., Oct. 1979, pp. 1616-1624.

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