Patent ID: 7676046
Filing Date: 2010-03-09
Classification: H04B

Abstract:
1. A method of removing noise and interference from a signal, comprising the steps of: a) receiving the signal; b) calculating a joint time-frequency domain of the received signal; c) estimating instantaneous frequencies of the joint time-frequency domain; d) modifying each estimated instantaneous frequency, if necessary, to correspond to a frequency of the joint time-frequency domain to which it most closely compares; e) redistributing the elements within the joint time-frequency domain according to the estimated instantaneous frequencies as modified; and f) computing a magnitude for each element in the joint time-frequency domain as redistributed; g) plotting the results of the step (f) as the time-frequency representation of the received signal; h) identifying in the plot of step (g) any noise and interference components in the received signal; i) eliminating from the redistributed joint time-frequency domain elements that correspond to the noise and interference identified in step (h); and j) recovering a signal devoid of the noise and interference from the redistributed joint time-frequency domain as modified in step (i).