Reachback WSN Connectivity: Non-Coherent Zero-Feedback Distributed Beamforming or TDMA Energy Harvesting?

摘要: This work is motivated by the reachback connec- tivity scenario in resource-constrained wireless sensor networks (WSNs): a single terminal at maximum power cannot estab- lish reliable communication link with intended destina- tion. Thus, neighboring distributed transmitters should contribute their radios and transmission power, order to achieve of common message. particularly interested low-SNR scenarios unreliable feedback chan- nels, no channel state information (CSI), commodity radios, where carrier phase/frequency synchronization not possible. Concrete non-coherent likelihood energy detection receivers are developed for zero-feedback beamform- ing. The proposed compared en- ergy harvesting reception, based on simple time-division multiple access. It shown that beamforming overcome connectivity adversities regime. achieved exploiting signals' align- ment M (i.e., beamforming), even expense network (total) consumption. Application include WSNs or emergency radio situations.