Title :
Opportunistic Beamforming with Wireless Powered 1-bit Feedback Through Rectenna Array
Author :
Krikidis, Ioannis
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Cyprus, Nicosia, Cyprus
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.
Keywords :
antenna arrays; antenna radiation patterns; array signal processing; geometry; higher order statistics; power combiners; probability; radiofrequency power transmission; rectennas; stochastic processes; telecommunication network reliability; telecommunication network topology; OBF scheme; beam outage probability; direct current combiner; high order statistics; multiantenna downlink; opportunistic beamforming scheme; radio frequency combiner; rectenna array; spatial randomness; stochastic geometry; wireless power transfer topology; wireless powered feedback; Antenna arrays; Arrays; Radio frequency; Receiving antennas; Rectennas; Transmitting antennas; Wireless communication; Antenna array; opportunistic beamforming; outage probability; spatial randomness; wireless power transfer;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2015.2457298
