Journal ArticleDOI
Continuous phase modulation
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TLDR
A number of methods for constructing constant amplitude signals which significantly outperform MSK are considered, and at what level of complexity these improvements are obtained and realized.Abstract:
M inimum Shift Keying (MSK) [ 11 or Fast Frequency Shift Keying (FFSK) is a digital modulation technique with constant amplitude which has been studied extensively during recent years. The properties of MSK are now understood [2-51. In this article, we report on methods to improve on MSK while maintaining a constant amplitude. By improvement we mean a narrower power spectrum, lower spectral sidelobes, better error probability, or all of the above. The cost of signal processing and the speed and complexity with which it can be performed has steadily been improved over recent years. Further improvements are to be expected. Therefore, it is reasonable to study what can be accomplished with methods that might be too complex for cost effective realization today, but perhaps may be easily achievable tomorrow. In this paper, we consider a number of methods for constructing constant amplitude signals which significantly outperform MSK [5-1031. We also discuss at what level of complexity these improvements are obtained and realized.read more
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References
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Journal ArticleDOI
GMSK Modulation for Digital Mobile Radio Telephony
K. Murota,K. Hirade +1 more
TL;DR: In this article, a digital modulation for future mobile radio telephone services is proposed, and its fundamental properties are clarified with the aid of machine computation, and the constitution of modulator and demodulator is discussed from the viewpoints of mobile radio applications.
Journal ArticleDOI
Continuous Phase Modulation--Part I: Full Response Signaling
Tor Aulin,C.-E. Sundberg +1 more
TL;DR: Comparisons are made with minimum shift keying (MSK) and systems have been found which are significantly better in E_{b}/N_{0} for a large signal-to-noise ratio (SNR) without expanded bandwidth, and schemes with the same bit error probability as MSK but with considerably smaller bandwidth have also been found.
Journal ArticleDOI
Partial-Response Signaling
Peter Kabal,Subbarayan Pasupathy +1 more
TL;DR: A PRS system model is introduced which enables the investigation of PRS schemes from the viewpoint of spectral properties such as bandwidth, nulls, and continuity of derivatives and it is shown that eye width, a performance measure that has not been used previously in comparing PRS systems, can be calculated analytically in many cases.
Journal ArticleDOI
Distribution of the Phase Angle Between Two Vectors Perturbed by Gaussian Noise
R. Pawula,S. Rice,J. Roberts +2 more
TL;DR: The probability distribution of the phase angle between two vectors perturbed by correlated Gaussian noises is studied in detail and its asymptotic behavior for large signal-to-noise for "small," "near \pi/2 ," and "large" angles is found.
Journal ArticleDOI
Minimum shift keying: A spectrally efficient modulation
TL;DR: The main attributes of MSK, such as constant envelope, spectral efficiency, error rate performance of binary PSK, and self-synchronizing capability will all be explained on the basis of the modulation format.