The aim of the 2009 International Conference on Signals, Circuits and Systems (SCS’09) is to address issues of pertinence to new advances in technologies related to the fields of signals, circuits and systems. The multi-disciplinary approach to engineering has become an important factor for the design of many new products and processes. The integration of mechanics, electronics, control and computing exploits and exceeds the relative advantages of single disciplines. When adequately integrated, the synergy among the areas ensures that performances reach much improved levels. The SCS’09 will be an international forum for researchers and specialists to exchange new ideas and practical experiences. It will provide an opportunity to present and discuss the latest research work in the several areas of the conference and to target future collaboration on current issues identified by conference participants. SCS’09 is technically co-sponsored by the IEEE, the IEEE Circuits and Systems Society and the IEEE Signal Processing Society.