Patent ID: 9270493
Filing Date: 2016-02-23
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A base station for a wireless network that performs calibration of an antenna array to remove distortion incurred by a plurality of transmit paths in the base station, the antenna array including a plurality of sub-arrays each connected to a corresponding one of the plurality of transmit paths, the base station comprising: a feedback receiver configured to receive a combined radio frequency feedback signal and output a combined feedback signal, the combined radio frequency feedback signal being a summation of a plurality of output signals of the plurality of transmit paths in response to a plurality of input signals; and a scalable estimation ring configured to estimate impulse responses of the plurality of transmit paths based on the combined feedback signal in a distributed manner, the scalable estimation ring comprising a plurality of scalable estimation ring coordinated processing components each operating to estimate the impulse response of a corresponding one of the plurality of transmit paths.