Pulse or digital communications – Repeaters – Testing
Patent
1988-11-14
1991-09-17
Olms, Douglas W.
Pulse or digital communications
Repeaters
Testing
375 42, 375 18, 375118, 3701053, H04L 512, H04L 2302
Patent
active
050501895
ABSTRACT:
A transceiver for a LAN is capable of communicating multiple bits per signal element to increase the data throughput of the LAN. The transceiver includes a transmitter which receives a multiple bit digital input value originating at a node of the LAN at which the transceiver is present. The transmitter converts the multiple bit digital input signal into a pulse-like analog signal which is amplitude and phase modulated. A receiver of a transceiver at a receiving node the transmitted analog signal converts its amplitude and phase into a corresponding multiple bit digital output value. A time-domain filter of the receiver creates a primary signal from the received analog signal. To sample the primary signal at its maximum amplitude point, a derivative of the primary signal waveform is used to establish the zero derivative point at which the primary signal attains its maximum amplitude, and to establish a fixed sampling point for subsequent signals. The sampling point is synchronized in phase with the stream of received analog signals. The residual intersymbol interference (ISI) effect of preceding signals on the LAN medium is eliminated prior to converting the primary signal to the digital value. To adjust and compensate for attenuation and amplification created by the LAN medium, the signal values are normalized.
REFERENCES:
patent: 3087065 (1963-04-01), Mutschler
patent: 3337691 (1967-08-01), Litchman
patent: 3482101 (1969-12-01), Slaymaker
patent: 3532890 (1970-10-01), Denton
patent: 3571756 (1971-03-01), Skoog et al.
patent: 3621139 (1971-11-01), Gibson
patent: 3689699 (1972-09-01), Brenig et al.
patent: 3733550 (1973-05-01), Tazaki et al.
patent: 3755676 (1973-08-01), Kinsel
patent: 3775688 (1973-11-01), Hinoshita et al.
patent: 3851252 (1974-11-01), Karnaugh et al.
patent: 3897887 (1975-08-01), Goldberg
patent: 3979561 (1976-09-01), Hinkle et al.
patent: 3985423 (1976-10-01), Tseng
patent: 4062618 (1977-12-01), Steensoma
patent: 4101734 (1978-07-01), Dao
patent: 4161628 (1979-07-01), McRae
patent: 4206320 (1980-06-01), Keasler et al.
patent: 4258433 (1981-03-01), Herschtal et al.
patent: 4326289 (1982-04-01), Dickinson
patent: 4339818 (1982-07-01), Gruenberg
patent: 4348075 (1982-09-01), Gottlieb et al.
patent: 4386323 (1983-05-01), Jansen
patent: 4451827 (1984-05-01), Kahn et al.
patent: 4534040 (1985-08-01), Thopar
patent: 4564023 (1986-01-01), Stahler
patent: 4575860 (1986-03-01), Scordo
patent: 4597090 (1986-06-01), Forney, Jr.
patent: 4599732 (1986-07-01), LeFever
patent: 4602365 (1986-07-01), White et al.
patent: 4649535 (1987-03-01), Ulug
patent: 4675671 (1987-06-01), Ishizuka et al.
patent: 4675880 (1987-06-01), Davarian
patent: 4700185 (1987-10-01), Balph et al.
patent: 4701905 (1987-10-01), Un et al.
patent: 4701908 (1987-10-01), Ikeda
patent: 4713817 (1987-12-01), Wei
patent: 4752924 (1988-06-01), Darnell et al.
patent: 4756007 (1988-07-01), Qureshi et al.
patent: 4757497 (1988-07-01), Beierle et al.
patent: 4771286 (1988-09-01), Niessen et al.
patent: 4780889 (1988-10-01), Ley et al.
patent: 4782482 (1988-11-01), Kiatipov et al.
patent: 4789982 (1988-12-01), Coden
patent: 4792944 (1988-12-01), Takahashi et al.
patent: 4797879 (1989-01-01), Habbab et al.
patent: 4821296 (1989-04-01), Cordell
patent: 4841551 (1989-06-01), Avaneas
patent: 4855997 (1989-08-01), Wilson et al.
patent: 4896338 (1990-01-01), Rouillet et al.
patent: 4907224 (1990-03-01), Scoles et al.
800 MB/S PCM Multilevel Transmission System over Coaxial Cables by Aratoni & Fukinuki.
Excerpt of Chapter 2 from "A Commonsense Approach to the Theory of Error Correcting Codes", Benjamin Arazi, The MIT Press, 1988.
Excerpt from "Error Detecting Codes, Self-Checking Circuits and Applications", by John Wakerly, 1982.
Excerpt of "Microcomputer Interfacing", by Harold S. Stone, 1983.
Excerpt from: "Circuits and Application Seminar", by Fairchild pertaining to Data Synchronizer, published 1982.
"Anomalous Behavior of Synchronizer and Arbiter Circuits", by Thomas J. Chaney and Charles E. Molnar published in an unknown publication.
Article, "Designers Confront Metastability in Boards and Buses", by John Beaston and R. Scott Tetrick, Computer Design, Mar. 1, 1986.
Cox William M.
Fischer Michael A.
Halpern Peter H.
Koos Larry W.
Lawrence Charles
Datapoint Corporation
Ley John R.
Olms Douglas W.
Smith Ralph
LandOfFree
Multibit amplitude and phase modulation transceiver for LAN does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multibit amplitude and phase modulation transceiver for LAN, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multibit amplitude and phase modulation transceiver for LAN will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1923279