DocumentCode :
1301774
Title :
Simple, zero-feedback, distributed beamforming with unsynchronized carriers
Author :
Bletsas, Aggelos ; Lippman, Andy ; Sahalos, John N.
Volume :
28
Issue :
7
fYear :
2010
fDate :
9/1/2010 12:00:00 AM
Firstpage :
1046
Lastpage :
1054
Abstract :
This work studies zero-feedback distributed beamforming; we are motivated by scenarios where the links between destination and all distributed transmitters are weak, so that no reliable communication in the form of pilot signals or feedback messages can be assumed. Furthermore, we make the problem even more challenging by assuming no specialized software/hardware for distributed carrier synchronization; we are motivated by ultra-low complexity transceivers. It is found that zero-feedback (i.e. blind), constructive, distributed signal alignment at the destination is possible; the proposed scheme exploits lack of carrier synchronization among M distributed transmitters and provides beamforming gains. Possible applications include reachback communication in low-cost sensor networks with simple (i.e. conventional, no carrier frequency/phase adjustment capability) radio transceivers.
Keywords :
array signal processing; synchronisation; transceivers; transmitters; wireless sensor networks; carrier synchronization; distributed beamforming; distributed transmitters; reachback communication; ultra-low complexity transceivers; unsynchronized carriers; wireless sensor networks; zero-feedback beamforming; Array signal processing; Crystals; Frequency synchronization; Radio transmitters; Steady-state; Synchronization; Beamforming; connectivity; cooperative transmission; wireless networks;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.2010.100909
Filename :
5555903
Link To Document :
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