Patent ID: 6804262
Filing Date: 2004-10-12
Classification: H04B,H04L,H04N

Abstract:
In a cable telecommunications system in which a transmitter transmits a signal over a cable network to a receiver, said signal comprising a plurality of signal components, each one of said signal components being defined by a distinct frequency range,a method for selectively receiving a target signal component from among said plurality of signal components, said method comprising the steps of: obtaining a first plurality of power measurements for a first signal component of said signal, said first signal component being defined by a first frequency range, said first plurality of power measurements including a first power measurement and a second power measurement, wherein obtaining a plurality of power measurements includes the steps of: (a) tuning a first frequency selection system to a first center frequency, said first center frequency being within said first frequency range; (b) said first frequency selection system providing a first filtered signal from a first band of frequencies of said signal centered about said first center frequency; (c) measuring the power of said first filtered signal to obtain said first power measurement; (d) tuning said first frequency selection system to a second center frequency, said second center frequency being within said first frequency range; (e) said first frequency selection system providing a second filtered signal from a second band of frequencies of said signal centered about said second center frequency; and (f) measuring the power of said second filtered signal to obtain said second power measurement; and if said first plurality of power measurements satisfy predetermined criteria, identifying said first signal component as being said target signal component.