Title :
The cyclic prefix of OFDM/DMT - an analysis
Author :
Henkel, Werner ; Tauböck, Georg ; Ödling, Per ; Börjesson, Per Ola ; Petersson, Niklas
Author_Institution :
Telecommun. Res. Center, Vienna, Austria
Abstract :
We address the impact of a too short cyclic prefix on multicarrier systems such as orthogonal frequency division multiplexing (OFDM) and discrete multitone (DMT). The main result is that the intersymbol interference (ISI) and intercarrier interference (ICI) may be spectrally concentrated and analytical expressions showing this are given. A practical implication is, e.g., that the cyclic prefix in some xDSL systems can be surprisingly short, as shown in one example of ADSL transmission
Keywords :
OFDM modulation; adjacent channel interference; channel coding; cyclic codes; digital subscriber lines; equalisers; intersymbol interference; ADSL transmission; ICI; ISI; OFDM/DMT modulation; cyclic prefix; discrete multitone modulation; intercarrier interference; intersymbol interference; multicarrier transmission; orthogonal frequency division multiplexing; spectral concentration; time-domain equalization; xDSL; Communication industry; DSL; Frequency division multiplexing; Intersymbol interference; Mathematical analysis; Mathematics; OFDM modulation; Tail; Telecommunications; Time domain analysis;
Conference_Titel :
Broadband Communications, 2002. Access, Transmission, Networking. 2002 International Zurich Seminar on
Conference_Location :
Zurich
Print_ISBN :
0-7803-7257-3
DOI :
10.1109/IZSBC.2002.991762
