Title :
Scalable feedback control for distributed beamforming in sensor networks
Author :
Mudumbai, R. ; Hespanha, J. ; Madhow, U. ; Barriac, G.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA
Abstract :
Recent work has shown that large gains in communication capacity are achievable by distributed beamforming in sensor networks. The principal challenge in realizing these gains in practice, is in synchronizing the carrier signal of individual sensors in such a way that they combine coherently at the intended receiver. In this paper, we provide a scalable mechanism for achieving phase synchronization in completely distributed fashion, based only on feedback regarding the power of the net received signal. Insight into the workings of the protocol is obtained from a simple theoretical model that provides accurate performance estimates
Keywords :
array signal processing; channel capacity; distributed sensors; feedback; protocols; synchronisation; carrier signal; communication capacity; distributed beamforming; performance estimation; phase synchronization; protocol; scalable feedback control; sensor networks; Array signal processing; Biosensors; Capacitive sensors; Diversity methods; Feedback control; Frequency synchronization; Intelligent networks; Master-slave; Protocols; Timing;
Conference_Titel :
Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-9151-9
DOI :
10.1109/ISIT.2005.1523309
