Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI: | http://purl.tuc.gr/dl/dias/83560A96-05E4-4FAA-B9B7-D87EA686A429 | ||
| Έτος | 2014 | ||
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | ||
| Άδεια Χρήσης |
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| Βιβλιογραφική Αναφορά | K. Alexandris, G. Sklivanitis and A. Bletsas, "Reachback WSN Connectivity: Non-coherent Zero-Feedback Distributed Beamforming or TDMA Energy Harvesting?", IEEE Transactions on Wireless Communications, vol. 13, no. 9, pp. 4923 – 4934, Sept. 2014. DOI: 10.1109/TWC.2014.2330295 https://doi.org/10.1109/TWC.2014.2330295 | ||
| Εμφανίζεται στις Συλλογές |
This work is motivated by the reachback connectivity scenario in resource-constrained wireless sensor networks (WSNs): a single terminal at maximum power cannot establish a reliable communication link with the intended destination. Thus, neighboring distributed transmitters should contribute their radios and transmission power, in order to achieve reliable transmission of a common message. This work is particularly interested in low-SNR scenarios with unreliable feedback channels, no channel state information (CSI), and commodity radios, where carrier phase/frequency synchronization is not possible. Concrete non-coherent maximum likelihood and energy detection receivers are developed for zero-feedback distributed beamforming. The proposed receivers are compared with non-coherent energy harvesting reception, based on simple time-division multiple access. It is shown that the proposed zero-feedback distributed beamforming receivers overcome connectivity adversities at the low-SNR regime. This is achieved by exploiting signals' alignment of M distributed transmitters (i.e., beamforming), even with commodity radios, at the expense of network (total) power consumption. Application scenarios include resource-constrained WSNs or emergency radio situations.
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