Multiuser subcarrier and bit allocation for MIMO-OFDM systems with perfect and partial channel information

被引：28

作者：

Hu, ZP ^{[1
]}

Zhu, GX ^{[1
]}

Xia, Y ^{[1
]}

Liu, G ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Elect & Informat Engn, Wuhan, Peoples R China

来源：

2004 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, VOLS 1-4: BROADBAND WIRELESS - THE TIME IS NOW | 2004年

关键词：

MIMO; OFDM; multiuser; eigenvalue; adaptive subcarrier; allocation; mean feedback; adaptive modulation;

D O I：

10.1109/WCNC.2004.1311357

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Subcarrier and bit allocation schemes for SISO-OFDM systems in multiuser downlink scenario are well-documented. In this paper, we extend it to MIMO-OFDM systems and design a transmit scheme as a concatenation of dynamic subcarrier assignment, adaptive modulation and beamforming. With the goal of minimizing the overall transmit power required to meet the target BER, we develop an adaptive OFDM subcarrier allocation approach based on perfect and partial channel information. Simulation results show that our proposed algorithm outperforms the multiuser MIMO-OFDM with static FDMA technique considerably, and can lessen the performance loss caused by feedback delays. We have also evaluated the performance of the presented system under various number of transmit- and receive-antennas.

引用

页码：1188 / 1193

页数：6

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