System and method for aligning interference in uplink

摘要

Provided is a method of generating a transmit beamforming vector and a receive beamforming vector to substantially eliminate the effect of interference transmitted from macro terminals to a pico base station in a hierarchical cell environment. Also, provided is a method of selecting, from a plurality of macro terminals, a macro terminal for transmitting data to a macro base station.

主权项

1. A pico base station, comprising:
a channel matrix generator configured to generate a first channel matrix by estimating a channel between the pico base station and a pico terminal; a beamforming vector generator configured to generate a transmit beamforming vector of the pico terminal and a transmit beamforming vector of a macro terminal distinct from the pico terminal, based on the first channel matrix between the pico base station and the pico terminal, the transmit beamforming vector of the pico terminal to be applied by the pico terminal to a data stream to transmit-beamform the data stream, and the transmit beamforming vector of the macro terminal to be applied by the macro terminal to a signal to transmit-beamform the signal; a transmitter configured to transmit, to the pico terminal, the generated transmit beamforming vector of the pico terminal, and transmit, to the macro terminal, the generated transmit beamforming vector of the macro terminal; and a receiver configured to receive, from the pico terminal, the data stream that is transmit-beamformed by the pico terminal according to the transmitted transmit beamforming vector of the pico terminal.