Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2123
Title: Adaptive resource allocation for multicast OFDM systems with multiple transmit antennas
Authors: Özbek, Berna
Le Ruyet, Didier
Khiari, Hajer
Özbek, Berna
Izmir Institute of Technology. Electronics and Communication Engineering
Keywords: Adaptive subcarrier allocation
Multicast OFDM
Multiple transmit antennas
Precoding vector optimization
Orthogonal frequency division multiplexing
Issue Date: 2006
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Özbek, B., Le Ruyet, D., and Khiari, H. (2006). Adaptive resource allocation for multicast OFDM systems with multiple transmit antennas. IEEE International Conference on Communications, 10, 4409-4414. doi:10.1109/ICC.2006.255332
Abstract: We evaluate the impact of multiple transmit antennas on the performance of multicast OFDM systems by proposing a suboptimal low complexity algorithm. Associated with a powerful erasure code, it is possible to increase the data rate of multicast OFDM systems by selecting for each subcarrier to the users with a good channel condition. We show that the resource allocation which includes the precoding vector selection, subcarrier allocation and bit loading is a difficult optimization problem. We propose a suboptimal algorithm to solve this problem by avoiding the optimization to reduce complexity. When the users are not symmetrically distributed around the base station, we add a fair scheduler to guarantee that each user receives the same amount of data. We present simulation results where we compare the proposed multicast systems with the classical multicast OFDM systems. When the users are symmetrically distributed around the base station, the gain is rather small, whereas when the users are non-symmetrically distributed, the proposed algorithm outperforms OFDM systems with subcarrier allocation.
Description: 2006 IEEE International Conference on Communications, ICC 2006; Istanbul; Turkey; 11 July 2006 through 15 July 2006
URI: https://doi.org/10.1109/ICC.2006.255332
http://hdl.handle.net/11147/2123
ISSN: 0536-1486
0536-1486
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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