Pulse or digital communications – Repeaters – Testing
Patent
1990-03-13
1992-05-05
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
329300, H04L 2714
Patent
active
051114828
ABSTRACT:
An MSK signal detector uses a limiter to convert an input signal to a signal with only two levels. A transition interval decision and memorizing circuit decides whether intervals between transitions between these levels fall into windows centered at the half-period of the MSK space frequency and the half-period of the MSK mark frequency, or a window centered midway between these two. An MSK decision circuit tests the pattern of decision results to detect patterns corresponding to MSK input. Output from the MSK decision circuit is low-pass filtered and thresholded to produce an MSK detect signal indicating the presence of MSK input. A compact, low-power circuit structure is achievable. The circuit can be adapted for quick preamble detection by simple modifications to the MSK decision circuit and low-pass filter.
REFERENCES:
patent: 4414675 (1983-11-01), Comroe
patent: 4485347 (1984-11-01), Hirasawa et al.
patent: 4551846 (1985-11-01), Takeda et al.
patent: 4554665 (1985-11-01), Beesley
patent: 4569061 (1986-02-01), Breitwisch
patent: 4616187 (1986-10-01), Watanabe
patent: 4785255 (1988-11-01), Lucak et al.
R. deBuda, "Coherent Demodulation of Frequency-Shift Keying with Low Deviation Ratio", IEEE Transactions on Communications, vol. com-20, Jun. 1972, 429-435.
Chin Stephen
Manzo Edward D.
Oki Electric Industry Co. Ltd.
LandOfFree
MSK signal detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with MSK signal detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MSK signal detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1419024