Many torrent sites host a 35MB file labeled "Extra Quality" that is actually a 2003 scan with a virus-laden executable. True extra quality files are typically:
To the uninitiated, a PDF is a PDF. To an engineer, the difference is night and day. An "Extra Quality" version of Principles of Communication Systems must possess the following technical attributes:
Taub & Schilling’s strength is clarity. It doesn’t jump straight into Shannon’s theorem. Instead, it builds:
First published in 1971 , it has been updated through multiple editions to include Spread Spectrum (the basis for Wi-Fi and 4G) and Information Theory .
Communication systems run on equations. Square roots, integrals, and complex exponentials must be crisp. In low-quality scans, a plus sign (+) can be confused for a division sign (÷). Extra quality means the LaTeX or original typesetting is preserved.