Title :
OFDM code division multiplexing with unequal error protection and flexible data rate adaptation
Author_Institution :
Inst. of Commun. & Navigation, German Aerosp. Center, Wessling, Germany
Abstract :
An OFDM-CDM (orthogonal frequency division multiplexing code division multiplexing) system with adaptive symbol mapping is presented. This combination enables a robust transmission with flexible error protection and data rate adaptation for parallel data streams by exploiting additional diversity due to CDM. Performance results are presented for fading channels where OFDM-CDM with adaptive symbol mapping and soft interference cancellation is compared to conventional OFDM systems also taking into account channel coding with variable code rates
Keywords :
OFDM modulation; channel coding; diversity reception; fading channels; interference suppression; land mobile radio; multiplexing; variable rate codes; OFDM code division multiplexing; OFDM-CDM system; adaptive symbol mapping; channel coding; data rate adaptation; diversity; error protection; fading channels; flexible data rate adaptation; mobile communication systems; orthogonal frequency division multiplexing; parallel data streams; soft interference cancellation; unequal error protection; variable code rates; Adaptive systems; Channel coding; Code division multiplexing; Digital video broadcasting; Error correction codes; Fading; Interference cancellation; OFDM; Protection; Robustness;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965541
