Systems, methods, and media for selecting antennas and beamformers

摘要

Systems that: (a) select a current antenna subset; (b) receive signals in response to a transmission of pilot symbols using the current antenna subset: (c) determine a current objective function for the current antenna subset; (d) replace an antenna in the current antenna subset with another antenna not, in the current antenna subset, to form a next antenna subset; (e) receive signals in response to a transmission of pilot symbols using the next antenna subset; (f) determines a next objective function for the current antenna subset; (g) determines whether the next objective function is better than the current objective function, and if so creates a corresponding next occupation probability vector entry; and (h) determines whether the value for the corresponding next occupation probability vector entry is larger than a value for an optimal occupation probability vector entry, and if so sets the second antenna subset as the optimal antenna subset.

主权项

1. A system for selecting antennas comprising:
at least one hardware processor that:
(a) selects a current antenna subset consisting of at least one selected transmit antenna and at least one selected receive antenna from a set of available antennas including a plurality of available transmit antennas and a plurality of available receive antennas, wherein the number of antennas in the current antenna subset is less than the number of antennas in the set of available antennas;(b) causes each of the at least one selected transmit antenna in the current antenna subset to be coupled to one of at least one transmitter RF chain;(c) causes each of the at least one selected receive antenna in the current antenna subset to be coupled to one of at least one receiver RF chain;(d) receives first signals in response to a first transmission of pilot symbols using the current antenna subset;(e) determines a current objective function for the current antenna subset based on the signals received using the current antenna subset;(f) replaces an antenna in the current antenna subset with another antenna not in the current antenna subset from the set of available antennas to form a next antenna subset;(g) causes each of the at least one selected transmit antenna in the next antenna subset to be coupled to one of the at least one transmitter RF chain;(h) causes each of the at least one selected receive antenna in the next antenna subset to be coupled to one of the at least one receiver RF chain;(i) receives second signals in response to a second transmission of pilot symbols using the next antenna subset;(j) determines a next objective function for the current antenna subset based on the second signals received using the next antenna subset;(k) determines whether the next objective function is better than the current objective function, and if so creates a next occupation probability vector entry having a value corresponding to the next antenna subset; and(l) determines whether the value for the next occupation probability vector entry is larger than a value for an optimal occupation probability vector entry, and if so sets the second antenna subset as the optimal antenna subset;(m) iteratively selects a transmit beamformer and a receive beamformer by applying perturbation vectors to the transmit beamformer and the receive beamformer and evaluates power received using the transmit beamformer as perturbed and the receive beamformer as perturbed.