Patent ID: 11863241
Assignee: PARALLEL WIRELESS, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for performing Over-The-Air (OTA) testing for 5G New Radio (NR) beamforming, comprising:
transmitting, by only a User Equipment (UE) under test U and a supporting UE Sx, Orthogonal Frequency Division Multiplexing (OFDM) symbols containing UL Demodulation Reference Signals (DMRS) that are orthogonal to each other during a particular Uplink (UL) subframe;
computing, by a gNB, in the same UL subframe as the UL subframe of the transmitted DMRS signals, a channel estimation matrix, a precoding matrix, and MU-MIMO antenna element weighting coefficients;
transmitting, by the gNB in a subsequent Downlink (DL) subframe, known data streams to the UE under test U and the supporting UE Sx using the computed MU-MIMO antenna element weighting coefficients;
collecting, by a host PC, IQ samples from the UE under test U and a plurality of victim UEs Vx in the subsequent DL subframe; and
evaluating performance of the transmitted known data stream received at the UE under test U.