Transmit power allocation for a downlink two-user interference channel
- 10 January 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Communications Letters
- Vol. 9 (1) , 13-15
- https://doi.org/10.1109/LCOMM.2005.01019
Abstract
We develop the optimal transmit power allocation scheme that maximizes the total throughput for a downlink two-user interference channel. The derived optimal scheme allocates the total power to one user in better channel state, as in the greedy scheme, when the degree of interference between users exceeds a certain threshold. When it is less than the threshold, on the contrary, the transmit power is divided into two users, as in the water-filling scheme. Numerical results are presented to verify the optimality of the derived scheme and to show throughput gains over the greedy and water-filling schemes.Keywords
This publication has 4 references indexed in Scilit:
- Rate and power control in a two-user multicarrier channel with no coordination: the optimal scheme versus a suboptimal methodIEEE Transactions on Communications, 2003
- Transmit power adaptation for multiuser OFDM systemsIEEE Journal on Selected Areas in Communications, 2003
- Elements of Information TheoryPublished by Wiley ,2001
- Variable-rate variable-power MQAM for fading channelsIEEE Transactions on Communications, 1997