Title :
Reduced Feedback Designs for SDMA-OFDMA Systems
Author :
Özbek, Berna ; Le Ruyet, Didier
Author_Institution :
Electr. & Electron. Eng. Dept., Izmir Inst. of Technol., Izmir, Turkey
Abstract :
In SDMA-OFDMA wireless communication systems, the feedback load increases with the number of users, subcarriers and antennas in the cell. In this paper, we propose two efficient reduced feedback algorithms by selecting the clusters at the user side. For each cluster, we select the users according to their norm and their orthogonality. We evaluate the performance of the user selection algorithms considering the quantization effect. We also design a specific codebook design to quantize CSI for the proposed criterion.
Keywords :
OFDM modulation; frequency division multiple access; space division multiple access; SDMA-OFDMA systems; channel state information; codebook design; feedback design reduction; quantization effect; user selection algorithms; wireless communication; Algorithm design and analysis; Clustering algorithms; Feedback; Frequency conversion; Multiaccess communication; OFDM; Quantization; Radio transmitters; Resource management; Space technology;
Conference_Titel :
Communications, 2009. ICC '09. IEEE International Conference on
Conference_Location :
Dresden
Print_ISBN :
978-1-4244-3435-0
Electronic_ISBN :
1938-1883
DOI :
10.1109/ICC.2009.5199400
