US Patent No. 9,197,295

DOUBLE-STREAM BEAMFORMING METHOD AND DEVICE


Patent No. 9,197,295
Issue Date November 24, 2015
Title Double-stream Beamforming Method And Device
Inventorship Long Liu, Beijing (CN)
Qiong Li, Beijing (CN)
Assignee CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing (CN)

Claim of US Patent No. 9,197,295

1. A method of dual-stream beamforming, comprising:
determining Direction Of Arrival (DOA) angles of antennas;
determining array response vectors from the DOA angles;
generating two sets of coefficients from the array response vectors by allocating parameters according to the numbers of respective
sets of transmit antennas of a base station; and

performing beamforming respectively for two sets of antennas by the two sets of coefficients;
wherein the determining the DOA angles of the antennas comprises:
performing uplink channel estimation using an uplink pilot of a full bandwidth or a preset sub-band to determine a channel
matrix;

determining a channel related matrix from the channel matrix; and
determining the DOA angles of the antennas from the channel related matrix.