August 2005
Intermediate to advanced
240 pages
4h 32m
English
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3.4. UWB Multiple-Access Techniques
Ultra-wideband technology can deliver large amounts of data with low power spectral density and has been proven to be useful in short-range, high-data-rate applications. Such applications require that several transmitters coexist in the covered area. Therefore, proper multiple-access techniques are needed to perform the channelization for multiple users. In a typical multiple-access communications system, several users transmit information simultaneously and independently over a shared channel. The received signal is therefore the superposition of all users' signals, with different delay and attenuation factors caused by the wireless link, in addition to channel noise. A multiuser receiver extracts the desired ...
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