Innovative approaches for adaptive noise cancellation are promoted in this book.The book deals with digital signal processing for signal enhancement, it offers a rich source of information related to the design and implementation of subband adaptive noise cancellation systems. These systems can be very useful in many real time applications such as telecommunications, hearing aids, voice controlled systems, teleconferencing and many others. The book targets DSP designers, researchers and postgraduates in the field of DSP for mobile communication systems. Full details of methodologies, mathematical modeling and simulation parameters are disclosed for the reader. The book also provides full analysis of the results obtained from subjecting the developed systems to environmental noise.