Notice To All Users:All books of this website are for public. No files are hosted on our server, they are only indexed much like how Google, Yahoo, Bing, ect works. This site merely indexes content that is readily available all over the web. The hosting server or the administrator cannot be held responsible for the contents of any linked sites or any link contained in a linked site, or changes / updates to such sites. All materials on this website is strictly for Educational Purposes ONLY.
File Format | PDF
File Size | 2.02 MB
Pages | 300
Language | English
Category | Networks
|
Description: Frequency
spectrum is a limited and valuable resource for wireless communications. A good
example can be observed among network operators in Europe for the prices to pay
for UMTS-frequency bands. Therefore, the first goal when designing future
wireless communication systems (e.g. 4G - fourth generation) has to be the
increase in spectral efficiency. The development in digital communications in
the past years has enabled efficient modulation and coding techniques for
robust and spectral efficient data, speech, audio and video transmission.
These are the
multi-carrier modulation (e.g. OFDM) and the spread spectrum technique (e.g.
DS-CDMA), where OFDM was chosen for broadcast applications (DVB, DAB) as well
as for broadband wireless indoor standards (ETSI HIPERLAN-II, IEEE-802.11) and
the DS-CDMA was selected in mobile communications (IS-95, third generation
mobile radio systems world wide, UMTS/IMT 2000). Since 1993 various
combinations of multi-carrier (MC) modulation and the spread spectrum (SS)
technique have been introduced and the field of MC-SS communications has become
an independent and important research topic with increasing activities.
|
Multi-Carrier and Spread Spectrum Systems
Download | Free
