Pulse or digital communications – Repeaters – Testing
Patent
1992-04-03
1994-01-11
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
380 34, 375 8, 375 96, 375107, 379 93, H04L 2730
Patent
active
052788628
ABSTRACT:
A method of transmitting and receiving data packets across a noisy communication medium, e.g., an AC power line. The data packets are transmitted using spread-spectrum chirps. A first sequence of the chirps forms a contention-resolution preamble used by transmitters to resolve conflicting contentions for access to the communication medium. The preamble is followed by a second sequence of chirps that form a start-of-packet symbol used by receivers to delineate the start of data within the packet. To simplify detection at the receiver, identical chirps are used in the preamble and the start-of-packet symbol. To enable the receiver to avoid erroneously interpreting preamble chirps as start-of-packet chirps, and thereby erroneously begin to accept packet data, chirps in the preamble are transmitted at a different pitch (i.e., different time period between inception of successive chirps) from chirps in the start-of-packet symbol.
REFERENCES:
patent: 4037159 (1977-07-01), Martin
patent: 4100498 (1978-07-01), Alsup et al.
patent: 4244053 (1981-01-01), Clinch et al.
patent: 4409593 (1983-10-01), Bose
patent: 4468792 (1984-08-01), Baker et al.
patent: 4656642 (1987-04-01), Apostolos et al.
Gregory Bernarr E.
Intellon Corporation
LandOfFree
Timing for spread-spectrum communication across noisy media does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Timing for spread-spectrum communication across noisy media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing for spread-spectrum communication across noisy media will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1636565