Conveying digital data in noisy, unstable, multipath environment

Details Conveying digital data in noisy, unstable, multipath environment Conveying digital data in noisy, unstable, multipath environment

1991-06-24

1993-08-24

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

370 21, 341180, H04L 2728, H04J 1100

Patent

active

052395600

ABSTRACT:
An decoding system for transmitting a signal through a noisy, unstable, mipath environment, in which the signal consisting of eight possible symbols is encoded using four of eight possible frequencies in an orthogonal Hadamard matrix, transmitted through the environment, and decoded using the same orthogonal Hadamard matrix, thereby providing a correlation result which can compensate for at least one error in the received signal for each symbol.

REFERENCES:
patent: 3510595 (1970-05-01), Gutleber
patent: 3518547 (1970-06-01), Filipowsky
patent: 3810019 (1974-05-01), Miller
patent: 3833767 (1974-09-01), Wolf
patent: 4293953 (1981-10-01), Gutleber
patent: 4601046 (1986-07-01), Halpern et al.
patent: 4731799 (1988-03-01), Longstaff et al.

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