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

fYear

2002

fDate

2002

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Broadband Communications, 2002. Access, Transmission, Networking. 2002 International Zurich Seminar on

Conference_Location

Zurich

Print_ISBN

0-7803-7257-3

Type

conf

DOI

10.1109/IZSBC.2002.991762

Filename

991762