Title :
Multi-user detection in OFDM systems using CDMA and multiple antennas
Author :
Degen, Christoph ; Brühl, Lars
Author_Institution :
Inst. of High Frequency Technol., Aachen Univ., Germany
Abstract :
In this paper multiuser detection in OFDM systems is examined. The separation of concurrently transmitted signals is based on space division and code division multiple access (SD/CDMA). The achievable bit error ratio and the peak to average power ratio (PAPR) are evaluated for different spreading strategies. A novel time domain spreading technique for OFDM systems is proposed for which the PAPR is independent of the processing gain. The examined OFDM techniques are compared with single-carrier transmission using equalization in the frequency domain (SC/FDE), which shows strong similarities to OFDM systems.
Keywords :
OFDM modulation; code division multiple access; error statistics; mobile radio; multiuser detection; space division multiple access; spread spectrum communication; time-domain analysis; OFDM systems; PAPR; SD/CDMA; bit error ratio; code division multiple access; multiple antennas; multiuser detection; peak to average power ratio; space division multiple access; time domain spreading technique;
Conference_Titel :
Personal Mobile Communications Conference, 2003. 5th European (Conf. Publ. No. 492)
Print_ISBN :
0-85296-753-5
DOI :
10.1049/cp:20030230
