Generalized minimum shift-keying modulation techniques

The simultaneous data demodulation and phase tracking of an MSK signal using the Viterbi algorithm is described, and two variations of MSK modulation are studied. The MSK with overlay is a dual-rate modulation techniques in which low-rate and high-rate data are superimposed on an MSK signal. Here th...

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Bibliographic Details
Published in:IEEE transactions on communications 1988-01, Vol.36 (1), p.32-40
Main Authors: Sadr, R., Omura, J.K.
Format: Article
Language:English
Subjects:
Applied sciences
Communications And Radar
Continuous phase modulation
Demodulation
Exact sciences and technology
Information, signal and communications theory
Jamming
Modulation, demodulation
Phase estimation
Phase modulation
Random sequences
Receivers
Signal and communications theory
Spread spectrum communication
Telecommunications and information theory
Time division multiple access
Viterbi algorithm
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Summary:The simultaneous data demodulation and phase tracking of an MSK signal using the Viterbi algorithm is described, and two variations of MSK modulation are studied. The MSK with overlay is a dual-rate modulation techniques in which low-rate and high-rate data are superimposed on an MSK signal. Here the demodulator uses the Viterbi algorithm to estimate both the low-rate and high-rate data simultaneously. The MSK with pseudorandom sequence spreading combats intentional or unintentional jamming. A simplified receiver for these spread-spectrum MSK signals is found that takes into consideration the effect of random phase perturbations. The performance of these demodulators is evaluated using transfer-function bounds for the bit error probability. For demodulation of the spread spectrum MSK signal, a simplified receiver is derived, and its performance in the presence of continuous jamming is evaluated.< >
ISSN:0090-6778
1558-0857
DOI:10.1109/26.2726