Testbed for Wireless Adaptive Signal Processing Systems

Due to the several attractive features of wireless devices they are more and more expansively used, but the deployment of wireless sensors in control applications is not spread yet because of the unreliable data transfer. This paper introduces a testbed which serves as a platform for investigations of wireless closed loop adaptive signal processing and control systems. The novelty of this testbed is that it makes possible the practical tests of algorithms in wireless environment. Since the traditional signal processing algorithms are not prepared for peculiar problems that emerge because of wireless data transfer (e.g. data loss), the exhaustive study of their behavior is necessary. This test system plays an important role in these investigations. Since the testbed offers also an application (the active noise control), algorithms can be studied in the same circumstances so ensuring the comparability of different structures.

I. INTRODUCTION

Nowadays the investigation of wireless sensor networks' (WSN) application is a relevant research topic, because WSNsare utilized with success in various fields [1]. The deployment of WSN has numerous advantages in contrast to wired systems. The most important of these are the easy installation and maintenance of sensors and actuators, the flexibility of arrangement, and the radio communication eliminates the costs of cabling. The intelligent sensors can themselves manage the network with marginal outer interaction. Nevertheless, because of the inherent and inevitable problems of radio communication (e.g. packet loss, uncertainty in data transfer time) the deployment of WSN in closed loop applications is not spread yet [2], since the traditional algorithms aren't prepared for these faults. These facts make necessary the comprehensive study of the field of wireless control.