Title :
A Kalman-filter method for power control in broadband wireless networks
Author_Institution :
AT&T Labs., Red Bank, NJ, USA
Abstract :
A Kalman-filter method for power control is proposed for broadband, packet-switched TDMA wireless networks. By observing the temporal correlation of cochannel interference when transmitters can send data contiguously, a Kalman filter is used to predict interference power in the future. Based on the predicted interference and estimated path gain between the transmitter and receiver, the transmission power is determined to achieve a desired signal-to-interference-plus-noise ratio (SINR). Performance results reveal that the Kalman-filter method for power control provides a significant performance improvement. Specifically, when a message consists of 10 packets on average, the 90 and 95 percentile of the SINR by the new method are 3.94 and 5.53 dB above those when no power control is in use, and lie just 0.73 and 1.04 dB below the upper-bound performance of the optimal power control, respectively, in a system with 4-sector cells and an interleaved frequency assignment of a reuse factor of 2/8. As a by-product, these results show that the cell layout and assignment scheme combined with the new method for power control can be used to support high-speed data services
Keywords :
Kalman filters; broadband networks; cellular radio; cochannel interference; correlation methods; data communication; frequency allocation; packet radio networks; power control; prediction theory; radio transmitters; telecommunication control; time division multiple access; transport protocols; 4-sector cells; Kalman-filter method; SINR; broadband wireless networks; cell assignment; cell layout; cochannel interference; estimated path gain; high-speed data services; interference power prediction; interleaved frequency assignment; packet-switched TDMA wireless networks; performance results; power control; receiver; reuse factor; signal-to-interference-plus-noise ratio; temporal correlation; transmission power; transmitters; upper-bound performance; wireless IP networks; Frequency; IP networks; Intelligent networks; Interference; Iterative algorithms; Power control; Signal to noise ratio; Time division multiple access; Transmitters; Wireless networks;
Conference_Titel :
INFOCOM '99. Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings. IEEE
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5417-6
DOI :
10.1109/INFCOM.1999.751485
