April 2009
Intermediate to advanced
765 pages
19h 26m
English
IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:
Definition of radio frequency signal
Radio frequency characteristics
Wavelength
Frequency
Amplitude
Phase
Radio frequency behaviors
Wave propagation
Absorption
Reflection
Scattering
Refraction
Diffraction
Loss (attenuation)
Free space path loss
Multipath
Gain (amplification)

To fully understand the 802.11 technology, you need to have a clear concept of how wireless works at the first layer of the OSI model, and at the heart of the Physical layer is radio frequency (RF) communications.
In a wired LAN, the signal is confined neatly inside the wire, and the resulting behaviors ...