Patent ID: 7280616
Filing Date: 2007-10-09
Classification: H04L

Abstract:
1. A digital receiver comprising: a tuner for converting a selected channel to a baseband channel signal; an adjustable low pass filtering arrangement for filtering said baseband signal; a demodulator including a first measuring arrangement for measuring a first value as a first function of a signal level of at least one first baseband signal component of said baseband signal whose frequency is adjacent an edge of said baseband channel and for measuring a second value as a second function of a signal level of at least one second baseband signal component of said baseband signal whose frequency is further from said edge of said baseband channel than a frequency of said at least one first baseband signal component, wherein said first value is measured as an average of levels of a first plurality of carriers whose frequencies are adjacent said edge of said baseband channel; and a controller for adjusting a passband of said low pass filtering arrangement such that said first and second values have a predetermined relationship, wherein the demodulator outputs a channel signal within the passband of said low pass filtering arrangement.