A Cautionary View of the use of Cyclic Prefix on CDMA Systems

Author

Panazio, Cristiano ; Bellanger, Maurice

Author_Institution

LCS/PTC, EPUSP, Sao Paulo

fYear

2006

fDate

2-5 July 2006

Firstpage

1

Lastpage

5

Abstract

We call attention to the fact that, under certain conditions, the signal-to-noise ratio loss for a given E_b/N₀ value and the spectral efficiency degradation caused by cyclic prefix (CP) insertion may outweigh its benefits that is intersymbol interference elimination and better equalization when compared to an equivalent CDMA system without CP and with similar complexity frequency domain equalizer. In this paper, we analyze how such conditions (channel length and its frequency selectivity, E_b/N₀, number of active codes and equalizer length) affect the performance of both approaches in chip level equalization context

Keywords

code division multiple access; equalisers; intersymbol interference; CDMA systems; chip level equalization context; cyclic prefix; equalization; frequency selectivity; intersymbol interference elimination; signal-to-noise ratio loss; spectral efficiency degradation; Bit error rate; Code division multiplexing; Degradation; Downlink; Equalizers; Frequency domain analysis; Intersymbol interference; Multiaccess communication; OFDM; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Conference_Location

Cannes

Print_ISBN

0-7803-9710-X

Electronic_ISBN

0-7803-9711-8

Type

conf

DOI

10.1109/SPAWC.2006.346389

Filename

4153877