Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (2): 24-28.doi: 10.1016/S1005-8885(08)60196-X

• Wireless • Previous Articles     Next Articles

Feedback threshold with guaranteed QoS in multiuser OFDM systems

YANG Rui-zhe, YUAN Chao-wei, TENG Ying-lei, ZHANG Yan-hua   

  1. School of Information and Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-30
  • Contact: YANG Rui-zhe

Abstract:

A threshold setting scheme is proposed based on the resource management and limited feedback theory in multiuser orthogonal frequency division multiplexing (OFDM) systems. In adaptive resource allocation, the factors denoting the quality of service (QoS) and fairness are both considered as the user weight. From the aspect of feedback outage probability, the proposed algorithm sets the threshold for each user related to its weight, which brings enough feedback to the user with greater weight. Analysis and simulation results show that, compared with the threshold ignoring weights, the proposed scheme has much lower feedback load while with better QoS.

Key words:

OFDM;multiuser;multimedia traffic;limited feedback