On the use of linear programming for dynamic subchannel and bit allocation in multiuser OFDM
- 13 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 6, 3648-3652 vol.6
- https://doi.org/10.1109/glocom.2001.966362
Abstract
Adaptive subcarrier allocation and adaptive modulation for multiuser orthogonal frequency division multiplexing (OFDM) is considered. The optimal subcarrier and bit allocation problems, that have been formulated in Wong et al., (1999), and Rhee et al., (2000), as nonlinear optimizations, are converted into linear ones and solved by integer programming (IP). A suboptimal approach that separately performs subcarrier allocation and bit loading is proposed. It is shown that subcarrier allocation in this approach can be optimized by the linear programming (LP) relaxation of the IP. Comparison through computer simulation indicates that performance of the suboptimal approach can be close to that of the optimal.Keywords
This publication has 2 references indexed in Scilit:
- Increase in capacity of multiuser OFDM system using dynamic subchannel allocationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Multiuser OFDM with adaptive subcarrier, bit, and power allocationIEEE Journal on Selected Areas in Communications, 1999