Title :
Beam Synthesis Method for Beamforming Adaptation in Cognitive Radio Based Wireless Communications Systems
Author :
Islam, Md Habibul ; Liang, Ying-Chang
Author_Institution :
Inst. for Infocomm Res.
Abstract :
In this paper, we propose an algorithm, namely, beam synthesis (BES) method for updating the beamforming weights from one TV channel to another TV band in cognitive radio based wireless regional area network (WRAN) communications systems. The proposed BES method tries to constrain not only the same null positions, but also the same main beam positions for different TV channels. The proposed method takes care of some problems associated with previously developed beamforming adaptation schemes for frequency division duplex (FDD) based wireless communications systems
Keywords :
array signal processing; cognitive radio; frequency division multiplexing; wireless channels; FDD; TV band; TV channel; beam synthesis method; beamforming adaptation; cognitive radio; frequency division duplex; wireless communications systems; wireless regional area network; Array signal processing; Cognitive radio; Degradation; Downlink; Electronic mail; Frequency conversion; Log periodic antennas; Switches; TV; Wireless communication;
Conference_Titel :
Radio and Wireless Symposium, 2007 IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
1-4244-0445-2
Electronic_ISBN :
1-4244-0445-2
DOI :
10.1109/RWS.2007.351891
