Accession Number : ADD015980

Title :   Conveying Digital Data in Noisy, Unstable, Multipath Environments.

Descriptive Note : Patent, Filed 24 Jun 91, patented 24 Aug 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Daniel, Richard A

Report Date : 24 Aug 1993

Pagination or Media Count : 12

Abstract : This patent discloses a decoding system for transmitting a signal through a noisy, unstable multipath 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.

Descriptors :   *DECODING, *CODING, *PATENTS, *TRANSMITTING, *SIGNAL PROCESSING, *FREQUENCY SHIFT KEYERS, CORRELATION, ERRORS, FREQUENCY, PATHS, SIGNALS, OSCILLATORS, CLOCKS, PHASE SHIFT KEYERS, AMPLIFIERS

Subject Categories : Cybernetics
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE