Patent ID: 7756219

Claim:
A WLAN (Wireless Local Area Network) transmitter capable of transmitting data signals modulated in accordance with an individual one of at least two different modulation schemes, said WLAN transmitter comprising: a front end section having a low-IF (Intermediate Frequency) topology and including a digital front end unit, one analog front end unit, and a DAC (digital-to-analog converter) coupling said digital front end unit to said analog front end unit, wherein said digital front end unit comprises: a first signal processing branch configured to process transmission data signals modulated in accordance with a first one of said at least two different modulation schemes, a second signal processing branch configured to process transmission data signals modulated in accordance with a second one of said at least two different modulation schemes, and a multiplexer having first and second inputs coupled to receive digital signals processed in the first and second processing branches, respectively, and configured to select one of the first and second inputs depending on which of the at least two different modulation schemes is being applied, wherein said analog front end unit comprises: one single signal processing branch coupled to receive analog signals from the DAC and configured to process transmission data signals modulated in accordance with any one of said at least two different modulation schemes; wherein said single signal processing branch of said analog front end unit is arranged to receive a signal indicative of which one of said at least two different modulation schemes is currently applied to the transmission data signals.