Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1995-02-21
1996-09-24
Chin, Wellington
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375298, 371 43, H04B 1500
Patent
active
055598358
ABSTRACT:
In a system that uses a dither signal in the production of a transmitted signal, the recoverability of an original trellis code is maintained while forming the dither signal using a modulo value that is equal to the distance between two adjacent symbols. This is accomplished by forming individual modulo counts for each of the orthogonal components produced by the transmitter's 3-tap FIR filter. The modulo counts and the bits from the trellis encoder are used to substitute the constellation subset identified by the trellis encoder with another constellation subset. The substituted subset is used for transmission and results in recovery of the original trellis code by the trellis decoder in the receiver.
REFERENCES:
patent: 4941154 (1990-07-01), Wei
patent: 5022053 (1991-06-01), Chung et al.
patent: 5040191 (1991-08-01), Forney, Jr. et al.
patent: 5159610 (1992-10-01), Eyuboglu et al.
patent: 5162812 (1992-11-01), Aman et al.
patent: 5195107 (1993-03-01), Wei
patent: 5249200 (1993-09-01), Chen et al.
patent: 5265127 (1993-11-01), Betts et al.
Telecommunications Industry Association, Paper TR-30-.1/93-04-14, "Implementation of precoding in V.fast" by Vedat Eyuboglu, et al, General DataComm Inc., Motorola Codex, Rockwell International, Atlanta, Ga., 15 Apr. 1993.
Telecommunications Industry Association, Paper TR-30.1/93-06 23, "ISI Coder-Combined Coding & Precoding" Rajiv Laroia, AT&T, Baltimore, Md., 14-18 Jun., 1993.
CCITT, Paper 989-1992, "Trellis precoding vs. linear pre-emphasis: test results", Motorola Information Systems, Baltimore, Md., Jul. 31-Aug. 2, 1991.
International Telecommunications Union, Telecommunications Standards Sector (ITU-TSS), Period 1993-96, "4D codes for V.fast", Motorola Information Systems, Rockville, Md., May 12-14, 1993.
European Search Report dated Apr. 11, 1995, regarding EPO Application No. 94 30 4979.
European Transactions On Telecommunications and Related Technologies, May-Jun. 1993, Italy, vol. 4, No. 3, pp. 243-256. "Advanced Modulation Techniques For V.Fast"; M. V. Eyuboglu, et al.
Chin Wellington
Lucent Technologies - Inc.
Malvone Christopher N.
May Timothy J.
LandOfFree
Method and apparatus for encoding data for transfer over a commu 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 apparatus for encoding data for transfer over a commu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for encoding data for transfer over a commu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1935464