Simple, zero-feedback, distributed beamforming with unsynchronized carriers
TL;DR: It is found that zero-feedback (i.e. blind), constructive, distributed signal alignment at the destination is possible and the proposed scheme exploits lack of carrier synchronization among M distributed transmitters and provides beamforming gains.
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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.
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Citations
Distributed and Collaborative Beamforming in Wireless Sensor Networks: Classifications, Trends, and Research Directions
TL;DR: A survey on the research trends of distributed and collaborative beamforming in WSNs uncovered that majority of existing research can be broadly divided into four major research trends: beampattern analysis, power and lifetime optimization, synchronization, and finally, prototype design.
182
•Proceedings Article
Pushing the Range Limits of Commercial Passive RFIDs
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TL;DR: PushID is presented, a system that exploits collaboration between readers to enhance the range of commercial passive RFID tags, without altering the tags whatsoever, and resolves the chicken-or-egg problem of inferring the optimal beamforming parameters to beam energy to a tag without any feedback from the tag itself.
Design and Analysis of Deterministic Distributed Beamforming Algorithms in the Presence of Noise
Ilaria Thibault,Azadeh Faridi,Giovanni Emanuele Corazza,Alessandro Vanelli Coralli,Angel Lozano +4 more
TL;DR: This paper presents a new deterministic closed-loop phase-alignment algorithm based on quantized feedback from the receiver for distributed beamforming that drastically reduces the amount of power consumed to achieve phase alignment, yet the new algorithm converges at least as fast as all other existing schemes.
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Architectures and Synchronization Techniques for Distributed Satellite Systems: A Survey
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TL;DR: In this paper , the synchronization techniques for Distributed Satellite Systems (DSSs) are reviewed and categorized. And a discussion on emerging data-driven synchronization techniques based on Machine Learning (ML) is provided.
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TL;DR: It is shown that a large fraction of the beamforming gains can be realised even with imperfect synchronization corresponding to phase errors with moderately large variance, and a stochastic analysis is presented that demonstrates the robustness ofbeamforming gains with imperfect synchronized synchronization.
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Mischa Dohler,Abdol Hamid Aghvami,Fatin Said,Seyed Ali Ghorashi +3 more
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TL;DR: In this article, the authors proposed a method of transmitting data across an electronic data communication system comprising a plurality of terminals that can send and receive data in the form of electromagnetic waves to and from at least one of the terminals.
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