Patent ID: 7095997

Claim:
A direct-conversion receiver for a communication system using modulation having a non-constant envelope, the direct-conversion receiver comprising: an analog stage for receiving a signal from a transmission channel, said analog stage comprising transposition means for transposing the signal to a baseband signal, at least one compensation module connected to said transposition means for compensating the baseband signal for static and dynamic DC voltage offsets within said analog stage, and programable-gain amplification means connected to said at least one compensation module for amplifying the compensated baseband signal; wherein said at least one compensation module further comprises an input terminal and an output terminal, first means connected to the input terminal for determining an envelope of an AC component of the baseband signal, second means connected to the input terminal for determining an envelope of the baseband signal, first subtraction means having a first input connected to an output of said first means, and a second input connected to an output of said second means, and second subtraction means having a first input connected to the input terminal, a second input connected to an output of said first subtraction means, and an output connected to the output terminal.