Opportunistic Beamforming with Wireless Powered 1-bit Feedback Through Rectenna Array
arXiv:1507.05389 · doi:10.1109/LSP.2015.2457298
Abstract
This letter deals with the opportunistic beamforming (OBF) scheme for multi-antenna downlink with spatial randomness. In contrast to conventional OBF, the terminals return only 1-bit feedback, which is powered by wireless power transfer through a rectenna array. We study two fundamental topologies for the combination of the rectenna elements; the direct-current combiner and the radio-frequency combiner. The beam outage probability is derived in closed form for both combination schemes, by using high order statistics and stochastic geometry.
accepted for publication in IEEE Signal Processing Letters