Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2008-05-27
2008-05-27
Payne, David C. (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S261000, C382S159000, C382S165000, C382S170000, C382S181000, C700S048000, C701S059000, C704S202000, C704S232000, C706S002000, C706S006000, C706S015000
Reexamination Certificate
active
10956603
ABSTRACT:
A modulation recognition method and device for digitally modulated signals with multi-level magnitudes are provided. The modulation recognition method includes selecting plural quantization sizes used to construct plural statistic histograms related to the magnitude of a sequence of data, setting up an off-line processing to extract plural useful feature patterns for each modulation type of interest, receiving a sequence of samples of a modulated object signal and constructing plural statistic histograms related to the magnitude of these samples, and adopting a hierarchical classification method for modulation recognition. It can be applied to the adaptive-modulation communication system, software defined radio, digital broadcasting systems and military communication systems. It can also be integrated with modulation recognition techniques for other types of modulated signals to function in a universal demodulator. It recognizes digitally modulated signals of multi-level magnitudes with low computational complexity in advancing the efficiency of communication systems.
REFERENCES:
patent: 4882738 (1989-11-01), Suzuki
patent: 5212741 (1993-05-01), Barski et al.
patent: 5381450 (1995-01-01), Lane
patent: 6028475 (2000-02-01), Kikuchi
patent: 2002/0041639 (2002-04-01), Krupezevic et al.
patent: 2001127810 (2001-11-01), None
Taira Shintaro, Automatic Classification of QAM Signals by Neural Networks, IEEE International Conference—vol. 2, pp. 1309-1312, 2001.
L. Vergara Dominquez, J.M. Paez Borrallo, J. Portillo Garcia and B. Ruiz Mezcua, “A general approach to the automatic classification of radiocommunication signals”, Signal Processing 22 (1991) 239-250, Elsevier Science Publishers B.V..
Chen Ching-Yung
Feng Chih-Chun
Dsouza Adolf
Industrial Technology Research Institute
Payne David C.
LandOfFree
Method and device for modulation recognition of digitally... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for modulation recognition of digitally..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for modulation recognition of digitally... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3943409