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Selective sampling method

Image Number 3 for United States Patent #4138680.

In an Omega receiver, for each of the Omega frequencies (10.2 KHz, 11 1/3 KHz, 13.6 KHz), a desired frequency is isolated by selectively sampling received signals at predetermined intervals. The samples are then processed such that samples corresponding to a desired frequency are additive and those corresponding to interferring signals cancel. Processing includes inverting certain samples and combining.

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