Title :
A study on downlink beamforming using block weight in TDD/MC-CDMA
Author :
Sato, Junichi ; Kajikawa, Yoshinobu ; Nomura, Yasuo
Author_Institution :
Dept. of Electron., Kansai Univ., Osaka, Japan
Abstract :
This paper proposes a novel transmit beamforming system at downlink in TDD/MC-CDMA. The proposed system includes transmit weighting and multiplexing schemes based on careful study of the orthogonality of spreading code. Hence, the proposed system can improve the BER performance and the transmission efficiency. On the other hand, the conventional transmit beamforming system degrades the BER performance because of the loss of orthogonality of spreading code due to frequency-selective fading channel. Simulation results demonstrate that the proposed system can improve the BER performance compared with the conventional systems.
Keywords :
channel coding; code division multiple access; error statistics; fading channels; radio links; TDD-MC-CDMA; block weight; downlink beamforming; frequency-selective fading channel; multiplexing schemes; spreading code; Antenna arrays; Array signal processing; Base stations; Bit error rate; Downlink; Frequency domain analysis; Mobile antennas; Multicarrier code division multiple access; OFDM; Performance loss;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2005. ISPACS 2005. Proceedings of 2005 International Symposium on
Print_ISBN :
0-7803-9266-3
DOI :
10.1109/ISPACS.2005.1595455
