Home | Amazing | Today | Tags | Publishers | Years | Account | Search 
Wireless Receiver Design for Digital Communications

Buy
There have been two paradigm shifts since we wrote the first edition of this book. The first major shift is that the world is now full of digital signals. Commercial television and radio have changed from analog to digital formats. Cellular telephone signals are digital, and even video baby monitors transmit digital signals. I’m not sure you can even find an analog signal on the air anymore. In a way, this is sad. In the “either you get a perfect signal or you get nothing” world of the digital broadcast, our children will never know the distinct pleasure of watching a snowy ultrahigh frequency (UHF) broadcast or listening to a crackling AM radio station after it has traveled from the other side of the nation.

The second paradigm shift since the publication of the first edition is the availability of inexpensive digital processing power. As of this writing (early 2011), processing power is essentially free. In the past, radio receivers performed filtering and demodulation in the analog world. Many old-school receivers performed demodulation using analog techniques that were finicky and required large amounts of circuit board real estate. Control functions such as automatic gain control (AGC) and automatic frequency control (AFC) were realized in the analog world using individual diodes, operational (op) amps, resistors and capacitors. Today, it makes technical and economic sense to perform these functions in the digital domain.

We find ourselves in a world where the receiver is primarily a downconverter whose sole purpose is to translate the signal of interest to a frequency and power level that is suitable to be sampled by an analog-to-digital converter (ADC). Similarly, transmitters convert the user’s information into complex waveforms using digital signal processing (DSP) techniques. A digital-to-analog converter (DAC) then converts these signals to the analog domain. The transmitter’s remaining task is to convert the modulated signal to its final frequency and power level.
(HTML tags aren't allowed.)

The Textbook of Pharmaceutical Medicine
The Textbook of Pharmaceutical Medicine

The Textbook of Pharmaceutical Medicine is the standard reference for everyone working and learning in pharmaceutical medicine. It is a comprehensive resource covering the processes and practices by which medicines are developed, tested and approved, and the recognised text for the Diploma in Pharmaceutical Medicine from the Faculty of...

English Grammar For Dummies
English Grammar For Dummies
When you’re a grammarian, people react to you in interesting — and sometimes downright strange — ways. When the first edition of English Grammar For Dummies came out in 2001, an elderly man asked me about something that had puzzled him for eight decades: Why did his church, St. Paul’s, include an...
Pro Apache Struts with Ajax
Pro Apache Struts with Ajax

Pro Apache Struts with Ajax maps out how to use the Apache Struts MVC web framework, so you can solve everyday web application development challenges. This book takes an application-centric approach: the development of an application drives Struts along with Ajax coverage--not the other way around.

Improper design can lead to...


Core Servlets and JavaServer Pages, Vol. 1: Core Technologies, Second Edition
Core Servlets and JavaServer Pages, Vol. 1: Core Technologies, Second Edition

The J2EE(TM) Platform has become the technology of choice for developing professional e-commerce applications, interactive Web sites, and Web-enabled applications and services. Servlet and JSP(TM) technology is the foundation of this platform: it provides the link between Web clients and server-side applications. In this 2nd...

The Optics of Life: A Biologist's Guide to Light in Nature
The Optics of Life: A Biologist's Guide to Light in Nature

Optics--a field of physics focusing on the study of light--is also central to many areas of biology, including vision, ecology, botany, animal behavior, neurobiology, and molecular biology. The Optics of Life introduces the fundamentals of optics to biologists and nonphysicists, giving them the tools they need to successfully incorporate...

Little One: A Story of Family, Love and Sacrifice - and an Extraordinary Secret
Little One: A Story of Family, Love and Sacrifice - and an Extraordinary Secret
You were once a newborn. It’s probably hard to imagine that now, sitting comfortably in your seat, wearing your clothes and reading this sentence. But there was a time when you were naked and new, bloody and blind, crying and cold. You were conscious in that moment, but will never remember it. You emerged from your...
©2021 LearnIT (support@pdfchm.net) - Privacy Policy