Patent ID: 6356742
Filing Date: 2002-03-12
Classification: H04N

Abstract:
A circuit for precorrecting a first signal in a broadcast signal transmitter for transmitting a combined signal on a common propagation device, comprising:an amplifying device for amplifying a first signal to provide an amplified first signal; an RF combiner for combining said amplified first signal with at least a second signal to provide at an output of said combiner a combined signal for propagation on a propagation device; an adaptive precorrector for receiving said first signal at a first input thereof and precorrecting said first signal for distortions introduced into said first signal by said amplifying device and said RF combiner in accordance with a signal sample received at a second input thereof, an output of said precorrector being applied to said amplifying device; and a hybrid (hybrid junction) which receives at one input thereof a sample of said combined signal, and which receives at a second input thereof a sample of said second signal in a manner so as to provide at an output thereof a sample of said first signal constituting said signal sample provided to said adaptive precorrector.