Title :
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
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;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1047337
