多用户OSTBC-OFDM系统的自适应子载波分配研究

Journal of Applied Sciences ›› 2007, Vol. 25 ›› Issue (1): 1-5.

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Adaptive Subcarrier Allocation for Multi-user OSTBC-OFDM Systems

LI Li¹, ZHU Guang-xi^1,2

1. Department of Electronic and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China

Received:2005-12-16 Revised:2006-03-02 Online:2007-01-31 Published:2007-01-31

Abstract

Abstract:

An adaptive subcarrier allocation algorithm for multiuser OSTBC-OFDM system is discussed in this paper. Aimed at minimizing the overall transmit power subjected to meet the target BER, an adaptive subcarrier general allocation algorithm with efficiency-priority is proposed.To achieve a desirable tradeoff between efficiency and fairness, all users are given a guaranteed transmission rate.An amendatory four-step algorithm with fairness constraint is described.Simulation results show that the proposed algorithms can improve BER performance of the OSTBC-OFDM system.

Key words: space time block coding (STBC), multi-input multioutput (MIMO), orthogonal frequency division multiplexing (OFDM), subcarrier allocation

CLC Number:

TN92
TN911

LI Li, ZHU Guang-xi. Adaptive Subcarrier Allocation for Multi-user OSTBC-OFDM Systems[J]. Journal of Applied Sciences, 2007, 25(1): 1-5.

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Adaptive Subcarrier Allocation for Multi-user OSTBC-OFDM Systems

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