Affiliation: | a Intelligent Autonomous Systems Laboratory, Faculty of Engineering, University of the West of England, Bristol, Coldharbour Lane, Frenchay, Bristol BS16 IQY, UK b Bristol Transputer Centre, Faculty of Computer Studies and Mathematics, University of the West of England, Bristol, Coldharbour Lane, Frenchay, Bristol BS16 1QY, UK c Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1TR, UK |