Browsing by Author "Lin, C. -A."

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Adaptive second-order control of transmitter power in wireless communication systems
(2011-05-04)
Wu, C. -H.
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Lin, C. -A.
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電控工程研究所
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Institute of Electrical and Control Engineering
The authors consider transmitter power control of wireless communication systems. They propose an adaptive second-order distributed power control algorithm in which the relaxation factors are adaptively adjusted to improve the rate of convergence. The algorithm updates power using a weighted combination of the distributed power control algorithm and the second-order power control (SOPC) algorithm. Simulation results show performance improvement over distributed constrained power control and constrained SOPC.
Linear coherent distributed estimation with cluster-based sensor networks
(2012-09-01)
Lin, C. -A.
;
Wu, C. -H.
;
電控工程研究所
;
Institute of Electrical and Control Engineering
The authors consider distributed estimation using sensor network with coherent multiple access channel model and LMMSE fusion rule. The sensors in the network are divided into a number of clusters. Sensors within the same cluster are allowed to collaborate through an amplification matrix to form a message this then transmitted. They formulate the problem of choosing the amplification matrices as an optimal power allocation problem under a total power constraint. The solution gives the optimal amplification matrices as scaled outer products of the observation gain and the channel gain vectors. The authors show that collaboration improves performance and, in simulations, demonstrate that the amount of improvement is closely related to the amount of collaboration.