Patent ID: 6304299
Filing Date: 2001-10-16
Classification: H04N

Abstract:
A method of mitigating multipath effects in a television signal comprising the steps of:adding an overlay signal to a television signal to provide a combined television and overlay signal, said overlay signal being a wide band random signal of substantially constant noise power spectral density;broadcasting said combined television and overlay signal over a channel;receiving said broadcast combined television and overlay signal;cross-correlating the received combined television and overlay signal with a locally generated replica of the transmitted overlay signal to generate an estimated impulse response signal;convolving the locally generated replica of the overlay signal with the estimated impulse response signal to generate an approximate signal of the overlay signal and its multipath components;subtracting the approximate signal of the overlay signal and its multipath components from the received combined television and overlay signal; andequalizing said received combined television and overlay signal such that multipath effects of said channel on said television signal are mitigated.