Title :
Comparing the performance of coded multiuser OFDM and coded MC-CDMA over fading channels
Author :
Ibars, Christian ; Bar-Ness, Yeheskel
Author_Institution :
Center for Commun. & Signal Process. Res., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
The bit error rate of a coded Multiuser OFDM (M-OFDM) system and coded multicarrier CDMA (MC-CDMA) system with multiuser detection is analyzed. The paper focuses on downlink wireless applications, where the channel suffers from frequency-selective fading. We investigate both systems when long time interleaving is possible, though introducing large delays, and when time interleaving is limited. Bit error rate lower bounds and simulation results show that, when the system load is high, M-OFDM performs similar to MC-CDMA while its implementation is less complex as it does not require multiuser detection
Keywords :
OFDM modulation; channel coding; code division multiple access; delays; error statistics; fading channels; modulation coding; multiuser channels; signal detection; BER lower bounds; M-OFDM; MC-CDMA; bit error rate; channel coding; coded MC-CDMA; coded multiuser OFDM system; delays; downlink wireless applications; fading channels; frequency-selective fading; long time interleaving; multiuser detection; orthogonal frequency division multiplexing; simulation results; system load; Bit error rate; Digital video broadcasting; Diversity methods; Fading; Frequency diversity; Interleaved codes; Multiaccess communication; Multicarrier code division multiple access; OFDM modulation; Wireless LAN;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965545
