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Multi-user detection in OFDM systems using CDMA and multiple antennas

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2 Author(s)
C. Degen ; Inst. of High Frequency Technol., Aachen Univ., Germany ; L. Bruhl

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.

Published in:

Personal Mobile Communications Conference, 2003. 5th European (Conf. Publ. No. 492)

Date of Conference:

22-25 April 2003