Receiving arrangement including a variable equalizer which variable

Abstract

An arrangement for producing a digital signal from an input (e.g., analog) signal obtained from a transmission medium. The arrangement includes a variable equalizer for equalizing the input signal as regards magnitude and phase as a function of frequency to produce an equalized signal, an equalizer control signal generator for generating first and second control signals for controlling the variable equalizer and a detector for producing the digital signal from the equalized signal. The arrangement further includes a bit array selector (i.e., a bit sequence detector) for generating one or two selection signals upon detection of one or more specific bit arrays (i.e., bit sequences) in the digital signal, and a sample-and-hold unit which samples one or more portions of the equalized signal under the influence of the one or two selection signals so as to produce at least one first sample value and at least one second sample value. The first and second control signals are derived in whole or in part from arithmetical combinations of the at least one first sample value and the at least one second sample value. The variable equalizer equalizes the input signal as regards magnitude in response to the first control signal and as regards phase in response to the second control signal.