A different look on cyclic prefix for SC/FDE

Author

Witschnig, H. ; Mayer, T. ; Springer, A. ; Koppler, A. ; Maurer, L. ; Huemer, M. ; Weigel, R.

Author_Institution

Inst. for Commun. & Inf. Eng., Linz Univ., Austria

Volume

2

fYear

2002

fDate

15-18 Sept. 2002

Firstpage

824

Abstract

We investigate the use of a known symbol sequence - a so-called unique word (UW) - instead of the well-known cyclic prefix (as it is used in OFDM, orthogonal frequency division multiplexing, systems) for a single carrier system with frequency domain equalization (SC/FDE). The considered SC/FDE system is similar to the one proposed in the IEEE 802.16.3c target group. It is shown that the UW fulfils the theorem of cyclic convolution required for efficient implementation of the SC/FDE structure. We elaborate on the advantages that result for equalization, channel estimation, and synchronisation. Compared to the advantages, the disadvantages in terms of BER behaviour and bandwidth efficiency are rather modest.

Keywords

OFDM modulation; channel estimation; convolution; decision feedback equalisers; error statistics; frequency-domain analysis; multipath channels; radio receivers; radio transmitters; synchronisation; BER; DFE; IEEE 802.16.3c target group; OFDM; bandwidth efficiency; channel estimation; cyclic convolution; cyclic prefix; frequency domain equalization; multipath propagation; orthogonal frequency division multiplexing; receiver; single carrier modulation system; symbol sequence; synchronisation; transmitter; unique word; Bandwidth; Bit error rate; Bit rate; Channel estimation; Convolution; Equalizers; Frequency domain analysis; Frequency synchronization; OFDM; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on

Print_ISBN

0-7803-7589-0

Type

conf

DOI

10.1109/PIMRC.2002.1047337

Filename

1047337