Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2322
Title: Performance of semi-orthogonal user selection for multiuser MISO systems
Authors: Le Ruyet, Didier
Khanfir, Hajer
Özbek, Berna
Özbek, Berna
Izmir Institute of Technology. Electronics and Communication Engineering
Keywords: Communication systems
Channel information
Data rates
Noise effects
Wireless communication systems
Quantized feedback
Issue Date: 2008
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Le Ruyet, D., Khanfir, H., and Özbek, B. (2008, July 6-9). Performance of semi-orthogonal user selection for multiuser MISO systems. Paper presented at the IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, Recife; Brazil. doi:10.1109/SPAWC.2008.4641622
Abstract: In MISO multiuser downlink wireless communication systems with precoding at the transmission, the capacity depends on the channel state information at the transmitter. Since the feedback data rate increases with the number of users in the cell it is important to perform a selection of the users at the receiver. In this paper, we evaluate the performance of different user selection algorithms at the receiver side through the noisy uplink channel. We evaluate the effect of the noisy channel on the classical norm criterion and on 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 as analog and quantized information to the base station through the noisy uplink channel. We propose an algorithm to reduce the noise effect on the analog feedback for semi-orthogonal user selection algorithm. We show that the semi-orthogonal criterion with quantized feedback gives better performance compared to the norm criterion for perfect and noisy uplink channels.
Description: IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008; Recife; Brazil; 6 July 2008 through 9 July 2008
URI: http://doi.org/10.1109/SPAWC.2008.4641622
http://hdl.handle.net/11147/2322
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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