Selective sampling method
AssigneeInternational Telephone and Telegraph Corporation
InventorsJames F. De Lorme, Arthur R. Tuppen
Life of this patent
Estimating the term…
Abstract
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.
Claims11
A method of isolating a preselected signal having a first frequency from at least one interferring signal having a frequency different from said first frequency comprising the steps of:
- receiving said preselected and said at least one signal;
- sampling said preselected and said at least one signal at predetermined intervals such that the phase and amplitude of each sample with respect to previous samples is known;
- and
- combining the samples of said preselected and said at least one signal are such that the samples of preselected signal are additive and those of said at least one signal cancelled.
Dependencies are inferred from the claim text.