DocumentCode :
3221055
Title :
A Downlink Tracking Algorithm by Adapting the Beamspace Weights of the Transmit Antenna
Author :
Hussain, S.S.I. ; Sheikh, M.I.
Author_Institution :
Univ. of Eng. & Technol., Lahore
fYear :
2007
fDate :
11-12 April 2007
Firstpage :
1
Lastpage :
6
Abstract :
A simple gradient algorithm for adaptation of complex base band beamspace weights of the transmit antenna at the base station by feedback from the mobile is presented. In order to converge to the optimal beamspace weights this beamspace beamformer relies on a single feedback bit from the mobile user. Here the ingenious idea is that the feedback bit indicates which of the two normalized perturbed beamspace weights of the base station array delivers more power to the mobile. Utilizing this feedback, our algorithm at the base station updates the complex beam space weights of the transmit beamformer. It converges to the optimum beam space weights for a static channel, which is confirmed by simulations.
Keywords :
antenna arrays; gradient methods; transmitting antennas; base station; beamspace beamformer; complex base band beamspace weights; downlink tracking algorithm; gradient algorithm; mobile user; static channel; transmit antenna; transmit beamformer; Adaptive arrays; Antenna arrays; Array signal processing; Base stations; Downlink; Feedback; Mobile antennas; Signal processing algorithms; Space stations; Transmitting antennas; adaptive beamforming; antenna array; beamspace processing; stochastic gradient algorithm; transmit beamforming;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Engineering, 2007. ICEE '07. International Conference on
Conference_Location :
Lahore
Print_ISBN :
1-4244-0893-8
Electronic_ISBN :
1-4244-0893-8
Type :
conf
DOI :
10.1109/ICEE.2007.4287349
Filename :
4287349
Link To Document :
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