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- W749492744 abstract "We investigate the capacity of a downlink channel, where all adjacent base stations are connected via capacity-constrained backbone links to transmit a message to one receiver. For the additive Gaussian case, such a virtual multiple-in single-out channel realizes the distributed transmit beamforming. Based on the model of the multiple-access channel (MAC) with partially cooperating encoders, the capacity results are first derived for the two-encoder and three-encoder settings and then extended to arbitrary N-encoder settings. By focusing on Gaussian MACs, a concept of working mode is developed to demonstrate the optimal cooperation between encoders when the total transmit power and total backbone capacity are limited at same time. By studying a massive beamforming where numerous encoders are engaged, our study reveals that a linear growth of beamforming capacity requires an exponential growth in total backbone capacity." @default.
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- W749492744 date "2014-12-11" @default.
- W749492744 modified "2023-09-28" @default.
- W749492744 title "Capacity study of distributed beamforming in relation to constrained backbone communication" @default.
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