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- W2154837360 abstract "For MISO multi-user downlink wireless communication system with precoding at the transmission, the channel state information at the transmitter can provide tremendous capacity gains. However, the amount of feedback data increases with the number of users in the cell and the number of transmit antennas. In this paper, we study on different algorithms and criteria in order to significantly reduce the amount of feedback data. We associate the classical norm criterion with a criterion based on the orthogonality between the user channels. Without cooperation between the users, we only allow users that are semi-orthogonal to feedback their channel information (CQI and CDI) to the base station. The feedback CDI is quantized using a local grassmanian packing. We show that the proposed combined criterion with a finite feedback rate gives better performance compared to the norm criterion. Furthermore we show that the performance is not affected by CQI quantization." @default.
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- W2154837360 date "2008-02-01" @default.
- W2154837360 modified "2023-09-26" @default.
- W2154837360 title "Semi-orthogonal user selection for MISO systems with quantized feedback" @default.
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- W2154837360 doi "https://doi.org/10.1109/wsa.2008.4475554" @default.
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