Patent ID: 7415247

Claim:
A method for processing signals received from different radio interfaces of communication systems, comprising steps in which: a carrier-frequency signal is received from a radio interface, the signal at the carrier frequency is bandpass-filtered, the filtered signal at the carrier frequency is amplified, a RX mixing signal at a receive frequency is generated, a complex baseband signal is generated from the received carrier-frequency signal by mixing it with the RX mixing signal, the baseband signal generated is low-pass filtered, the baseband signal generated is amplified or attenuated prior to analog-to-digital conversion, the baseband signal is converted to digital, and the baseband signal converted to digital is processed so as to produce an information signal encoded and modulated into the received carrier-frequency signal, wherein said amplifying of the carrier frequency signal is performed with one and the same amplifier for signals received from at least two different radio interfaces, and a gain of said amplifier is set with a program-controlled gain control signal in relation to the radio interface from which signals are received, said generating of the complex baseband signal is performed with one and the same mixer for signals received from at least two different radio interfaces, said RX mixing signal is generated with a frequency synthesizer, and an output frequency of said frequency synthesizer is selected with a program-controlled frequency selection signal in relation to the radio interface from which signals are received, and said bandpass-filtering is performed using a pass band selected with a program-controlled pass-band selection signal in relation to the radio interface from which signals are received.