Title :
Space frequency block codes and code division multiplexing in OFDM systems
Author_Institution :
Inst. of Commun. & Navigation, German Aerosp. Center, Wessling, Germany
Abstract :
The paper investigates different diversity concepts for OFDM systems. These are space frequency block codes (SFBCs) and code division multiplexing (CDM). The performances of both, and of combinations of both, are compared for coded OFDM systems in a Rayleigh fading channel. The applied SFBCs and CDM have in common that they have no rate loss and thus do not decrease the bandwidth efficiency of the system. While the SFBCs exploit space and frequency diversity, CDM exploits frequency and time diversity in OFDM systems. Additionally, the effects due to diversity gains by channel coding are taken into account in the investigations.
Keywords :
OFDM modulation; Rayleigh channels; block codes; channel coding; code division multiplexing; diversity reception; mobile radio; transmitting antennas; CDM; Rayleigh fading channel; SFBC; bandwidth efficiency; channel coding; code division multiplexing; coded OFDM systems; diversity gain; frequency diversity; mobile radio systems; space diversity; space frequency block codes; time diversity; transmit antenna diversity; Bandwidth; Block codes; Code division multiplexing; Diversity methods; Fading; Frequency diversity; Multicarrier code division multiple access; OFDM; Transmitters; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258657
