The modern era of digital communication dates to Claude Shannon’s three seminal papers appearing in 1948 and 1949 in the Bell System Technical Journal. Digital communication advanced rapidly in the following years and generated a large number of technologies, including cell phones, Wi-Fi, fiber optic communication, MP3 players, JPEG-encoded photographs, high-definition television (HDTV), etc. With increasing demands for remote and high-speed digital access to data and real-time video, advances are likely to continue for the foreseeable future. The topics covered in this book constitute a “first course” on digital communication because with a few exceptions, primarily related to the multipath propagation effects and fading, only the point-to-point additive white Gaussian noise channel is considered. This was one of the first channels to be seriously studied in the modern era of digital communication that began with Shannon. From a practical perspective, modulation and coding for the deep-space channel motivated much of the early work in this field. The material covered in this textbook is still widely used and forms the basis for subsequent and ongoing advancements in the field. Broadly speaking, the fundamentals covered in this textbook are the notion of information, entropy, lossless data compression, error-correcting methods in the presence of noise, the fundamental limits of reliable communication, channel capacity, optimum decision theory and optimum receiver principals, common modulation types, the relationship between bandwidth and dimensionality, system performance using modulation and coding, and the fundamental trade-off between energy-efficiency and bandwidth-efficiency.
It is common wisdom that the U.S. economy has adapted to losses in its manufacturing base because of the booming information sector, with high-paying jobs for everything from wireless networks to video games. We are told we live in the Information Age, in which communications networks and media and information services drive the larger economy. While the Information Age may have looked sunny in the beginning, as it has developed it looks increasingly ominous: its economy and benefits grow more and more centralized--and in the United States, it has become less and less subject to democratic oversight.
Corporations around the world have identified the value of information and are now seeking to control its production, transmission, and consumption. In How to Think about Information, Dan Schiller explores the ways information has been increasingly commodified as a result and how it both resembles and differs from other commodities. Through a linked series of theoretical, historical, and contemporary studies, Schiller reveals this commodification as both dynamic and expansionary, but also deeply conflicted and uncertain. He examines the transformative political and economic changes occurring throughout the informational realm and analyzes key dimensions of the process, including the buildup of new technological platforms, the growth of a transnationalizing culture industry, and the role played by China as it reinserts itself into an informationalized capitalism.
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