"This book presents advanced developments in digital filters and signal process methods covering different cases studies. Recent advances in microelectronics have made DSP an attractive alternative to analog signal processing. Digital signal processing systems are employed in a large variety of applications where analog processing once reigned, and of course newer purely digital applications such as modems, speech synthesis and recognition, and biomedical electronics abound. Digital signal processing (DSP) is playing an increasingly important role in coherent detection for reconstructing the complex field of signal and compensating for the transmission impairments. It dramatically simplifies the reception of multi-level and multi-dimensional modulation formats such as high-order quadrature amplitude modulation (QAM), thus making high-order QAM become a promising and practical approach for achieving higher bit rate and higher spectral efficiency. There still remain applications where analog signal processing systems prevail, mainly applications for which present-day DSP processors are not yet fast enough; yet the number of such applications is diminishing rapidly. Signals And Systems presents state of the art in the design and implementation of signal processing systems, illustrating a wide range of topics within the subject areas of system design and implementation, algorithms, architectures, and applications. This book intends to provide highlights of the current research in the digital signal processing area, showing the recent advances in this field. This book is recommended to readers who can consider on the collection of chapters authored/co-authored by various researchers as well as to researchers around the world covering the field of digital signal processing. "