Keynote 3: “Nonlinear system identification techniques: Some applications in telecommunication transmitter systems”

Wireless transmitters are responsible for sending information signals to receivers in telecommunication systems, such as in cellular networks. These devices operate under very restrictive conditions as no power can be transmitted outside the transmitter's given channel bandwidth, and the in-channel signal must be sent with a high quality level. Therefore, the distortion generated by the signal amplifying stages of the transmitter must be very low, which is not easily accomplishable especially if transmitter energy efficiency is also to be taken into concern. Modeling the complex behavior of wireless transmitters is, therefore, very important to identify their sources of distortion, for their reduction in new hardware designs and also for the implementation of distortion compensation schemes (linearizers) that try to mitigate the output distortion level of transmitters. This talk focuses on presenting the application of nonlinear system identification techniques as the support of transmitter modeling and compensation strategies, as considered in modern telecommunication systems and which are essential for their proper operation.