Conveying Digital Data in Noisy, Unstable, Multipath Environments.
Patent, Filed 24 Jun 91, patented 24 Aug 93,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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.
- Radio Communications