Pulse Code Modulation Techniques brings together the theory and practice of PCM at the physical layer, where the "bits meet the silicon", so to speak. The key topics of symbol encoding, detection and synchronization are discussed, in detail, both from a theoretical and a practical standpoint. Topics which have been largely absent in text books, such as multiplexing, formatting and format synchronization, are also considered. Although PCM evolved as a communication technology, it has become an important technology in data recording. In a sense, magnetic or optical media are just specialized communication media and the key technologies discussed in this book are just as important to recording applications as to communications. PCM codes used for magnetic recording applications are discussed along with traditional communication codes. The design, analysis and implementation of a PCM system requires knowledge of very specific techniques associated with detection, synchronization and coding. The techniques have evolved from both ad hoc methods and complex theory. One of the goals of this book is to bridge the gap between theory and practice in the key techniques. Matched filters are not only discussed theoretically, but means for implementing them are also considered. The same is true with symbol synchronization.
He became the nation's first hero. ...But before that, George Washington was just a man. And in his youth, he was a man on the make. He wanted to serve the king, so he donned a red coat and fought the French. He loved another man's wife but yearned for status, so he married a rich widow. He dreamed of wealth, so he accumulated land and slaves. He accumulated enemies, too... In Citizen Washington, one of those enemies--a newspaper publisher named Hesperus Draper--learns that Martha Washington has burned her husband's letters at his death. So Draper sets his nephew on a quest to find the truth about the letters and about the man himself. The younger Draper meets a dozen people, from Mount Vernon slaves and Iroquois Indians to Jefferson and Adams and the other giants of the era, and they tell their own stories as they tell Washington's: from his callow youth, through the harrowing battles of the Revolution, to the first American presidency. What emerges is a remarkable, multi-faceted portrait of a society reeling toward rebellion, a nation rushing to be born, and a man rising to greatness. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.
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