The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2018
Filed:
Aug. 10, 2017
Applicant:
National Instruments Corporation, Austin, TX (US);
Inventors:
Assignee:
NATIONAL INSTRUMENTS CORPORATION, Austin, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B 7/04 (2017.01); H04B 7/0413 (2017.01); H04L 5/00 (2006.01); H04B 17/11 (2015.01); H04W 88/08 (2009.01); H04B 7/06 (2006.01);
U.S. Cl.
CPC ...
H04B 7/0413 (2013.01); H04B 17/11 (2015.01); H04L 5/0048 (2013.01); H04B 7/0617 (2013.01); H04W 88/08 (2013.01);
Abstract
A wireless cellular base station includes M antennas and one or more processing devices. For each antenna, the antenna transmits a calibration pilot symbol over the air and the other M−1 antennas receive the calibration pilot symbol over the air. The processing devices select one of the M antennas as a reference antenna and for each antenna of the M antennas, the processing devices calculate channel reciprocity calibration coefficients of the antenna with respect to the reference antenna based on the received calibration pilot symbols.