Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Patent
1996-03-27
1999-07-27
Hsu, Alpus H.
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
370442, 370463, 370480, 455 51, H04J 100, H04J 316
Patent
active
059302313
ABSTRACT:
A communication system for coupling telephony or other signals to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers upstream to a headend unit (HIU) are modulated onto the reverse band of the broadband network in a frequency division multiple access (FDMA) arrangement. The upstream modulated telephony signals are received at a telephony network interface at the HIU coupled to the broadband network. A group of reverse band modulated telephony signals are received at a group receiver or channelizer. The group receiver processes all upstream telephony signals within a selected spectral subband in the reverse band to apply a receiver matched filter with a weighted overlap and add circuit, and are then converted to baseband by an FFT circuit. The group receiver provides a serial data stream representing the baseband telephony signals. The baseband telephony signals are processed to derive demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.
REFERENCES:
patent: 3992589 (1976-11-01), Kuegler
patent: 4709418 (1987-11-01), Fox et al.
patent: 4742512 (1988-05-01), Akashi et al.
patent: 4763317 (1988-08-01), Lehman et al.
patent: 4849811 (1989-07-01), Kleinerman
patent: 5029333 (1991-07-01), Graves et al.
patent: 5084903 (1992-01-01), McNamara et al.
patent: 5088111 (1992-02-01), MaNamara et al.
patent: 5125100 (1992-06-01), Katznelson
patent: 5140613 (1992-08-01), Birgenheier et al.
patent: 5153763 (1992-10-01), Pidgeon
patent: 5247347 (1993-09-01), Litteral et al.
patent: 5249205 (1993-09-01), Chehnakeshu et al.
patent: 5303229 (1994-04-01), Withers et al.
patent: 5323391 (1994-06-01), Harrison
patent: 5343240 (1994-08-01), Yu
patent: 5347304 (1994-09-01), Moura et al.
patent: 5351234 (1994-09-01), Beierle et al.
patent: 5357502 (1994-10-01), Castelain et al.
patent: 5376894 (1994-12-01), Petranovich
patent: 5400368 (1995-03-01), Cheng et al.
patent: 5412352 (1995-05-01), Graham
patent: 5440335 (1995-08-01), Beveridge
patent: 5469495 (1995-11-01), Beveridge
patent: 5537435 (1996-07-01), Carney et al.
patent: 5629929 (1997-05-01), Blanchard et al.
Kurth, Carl F., "SSB/FDM Utilizing TDM Digital Filters", IEEE Transactions on Communication Technology, Feb. 1971, pp. 63-71.
Freeny, Stanley L., et al., "Design of Digital Filters for an All Digital Frequency Division Multiplex-Time Division Multiplex Translator", IEEE Transactions on Circuit Theory, Nov. 1971, pp. 702-711.
Freeny, Stanley L., et al., "Systems Analysis of a TDM-FDM Translator/Digital A-Type Channel Bank", IEEE Transactions on Communication Technology, Dec. 1971, pp. 1050-1059.
Bellanger, Maurice G., "TDM-FDM Transmultiplexer: Digital Polyphase and FFT", IEEE Transactions on Communications, Sep. 1974, pp. 1199-1205.
Crochiere, Ronald E. and Rabiner, Lawrence R, "Weighted Overlap--Add Structures for Efficient Realization of DFT Filter Banks", Multirate Digital Signal Processing, Prentice Hall, 1983, Sec. 7.2.5, pp. 313-326.
Harris, Frederic J., "Time Domain Signal Processing with the DFT", Handbook of Digital Signal Processing Engineering Applications, Academic Press, 1987, Chapter 8, pp. 633-666.
Borazjani Ramin
Miller Kevin L.
Barnhardt III Hubert J.
Gardner Kelly A.
Hsu Alpus H.
Massaroni Kenneth M.
Ngo Ricky Q.
LandOfFree
Block spectrum receiver for a broadband communications system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Block spectrum receiver for a broadband communications system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block spectrum receiver for a broadband communications system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-887417