Title :
The effect of spreading factor in MC-CDMA systems under multi-cell environments in correlated fading channels
Author :
Koo, Jayong ; Han, Youngnam
Author_Institution :
Inf. & Commun. Univ., South Korea
Abstract :
In MC-CDMA systems, since a signal is spread and combined in the frequency domain, one of the main interests is to decide a spreading factor (SF) for optimal system configuration. We investigate the effect of SF on the link quality of coded systems under multi-cell environments. Also, we discuss the effects of radio link conditions, such as delay spreads and system load. We make an analytical derivation on multiple user interference (MUI) and other cell interference (OCI) power at arbitrary load, verified by simulation. It is revealed that OFDMA outperforms MC-CDMA with spreading under considerable load and a practical channel coder.
Keywords :
OFDM modulation; code division multiple access; delays; fading channels; frequency division multiple access; radiofrequency interference; MC-CDMA systems; OFDM; OFDMA; correlated fading channels; delay spread; link quality; multi-cell environments; multiple user interference; other cell interference; radio link conditions; spreading factor; system load; Analytical models; Delay effects; Delay systems; Fading; Frequency domain analysis; Interchannel interference; Intersymbol interference; Multicarrier code division multiple access; OFDM; Radio link;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1405046
