44results about How to "Improve received signal strength" patented technology

In a resource allocation method in a multicarrier-based mobile communication system that includes base stations and supports multiple access of a plurality of terminals identified using codes, the service area of each base station is divided into at least two virtual cells having different radii about the base station, and resources are actively allocated to terminals located in the service area according to distribution of the terminals in the virtual cells. The service area is divided into two virtual cells based on received signal strengths of the terminals for a specific subchannel, and the specific subchannel is allocated to one terminal or at most two terminals according to distribution of the terminals in the virtual cells.

In one embodiment, the method includes receiving a pilot signal from a terminal at a target antenna of the plurality of antennas of the network element, determining an uplink channel estimate for the target antenna based on the received pilot signal, and obtaining a calibration coefficient associated with the target antenna. The calibration coefficient is based on a channel estimate between the target antenna and a different one of the plurality of antennas. The method further includes beamforming a transmission to the terminal using at least the target antenna based on the determined uplink channel estimate and the obtained calibration coefficient.

The invention discloses a method and device for optimizing an IRS-assisted wireless communication system. The method comprises the steps of selecting a first preset number of reflection unit sets RUSat the preset position of an IRS; determining a channel time delay corresponding to each RUS in the first preset number of RUSs, estimating a reflection path length distance passing through each RUSbetween the wireless AP and UE based on the channel time delay corresponding to each RUS, and determining an initial estimation position of the UE by using a triangulation positioning method based on the reflection path length corresponding to each RUS; re-selecting a second preset number of RUSs taking the RUSs closest to and farthest from the initial estimated position of the UE as reference on the IRS, and re-estimating the position of the UE to obtain an optimized UE estimated position; with the channel difference corresponding to the RUS closest to the initial estimated position of theUE and the channel difference corresponding to the RUS farthest from the initial estimated position of the UE are maximum, so that the precision of the optimized estimated position of the UE is higher; and communicating based on the optimized UE position. According to the invention, the position of the UE can be accurately estimated, and the communication between the AP and the UE is optimized.