The additional topics covered in this edition are: 1. Computing the average probability of error for constellations having nonequiprobable symbols (Chapter 1). 2. Performance analysis of differential detectors in Rayleigh flat fading channels (Chapter 1). 3. Synchronization techniques for linearly modulated signals (Chapter 4).K. Vasudevan has been a faculty member of the Electrical Engineering (EE) department at IIT Kanpur since July 2001. He received his BTech (Electronics and Communications Engineering Honours) from IIT Kharagpur, and MS and PhD from the EE department, IIT Madras. He was a post-doctoral fellow at the Swiss Federal Institute of Technology (EPFL), Lausanne. His research interests are in the general area of communications and signal processing.