Transmit power allocation for a downlink two-user interference channel

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 e...

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Veröffentlicht in:	IEEE communications letters 2005-01, Vol.9 (1), p.13-15
Hauptverfasser:	PARK, Taewon, JANG, Jiho, SHIN, Oh-Soon, KWANG BOK LEE
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Base stations Downlink Exact sciences and technology Interference channels Interference constraints Laboratories Multiaccess communication Multiple access interference Power system modeling Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Throughput Transmission and modulation (techniques and equipments) Wireless communication
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Zusammenfassung:	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.
ISSN:	1089-7798 1558-2558
DOI:	10.1109/LCOMM.2005.01019