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Title: Semi-orthogonal user selection for MISO systems with quantized feedback
Authors: Khanfir, Hajer
Le Ruyet, Didier
Özbek, Berna
Keywords: Antenna accessories
Cellular telephone systems
Communication systems
Wireless telecommunication systems
Global system for mobile communications
Issue Date: 2008
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Khanfir, H., Le Ruyet, D., and Özbek, B. (2008, February). Semi-orthogonal user selection for MISO systems with quantized feedback. Paper presented at the 2008 International ITG Workshop on Smart Antennas, WSA 2008. doi:10.1109/WSA.2008.4475554
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.
Description: 2008 International ITG Workshop on Smart Antennas, WSA 2008; Darmstadt; Germany; 26 February 2008 through 27 February 2008
Appears in Collections:Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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