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:
May. 28, 2024
Filed:
Sep. 24, 2021
Rohde & Schwarz Gmbh & Co. KG, Munich, DE;
Heinz Mellein, Munich, DE;
Oussema Harguem, Munich, DE;
Rohde & Schwarz GmbH & Co. KG, Munich, DE;
Abstract
A method for determining a pre-equalization matrix to be used for testing is provided. A radio communication tester is provided that has a base station emulator and a channel emulator. A device under test is provided that has at least two branches. A N×M multiple-input multiple-output (MIMO) connection is established between the radio communication tester and the device under test. The N×M MIMO connection includes at least two channels. Reference signal received power per branch measurement values are continuously forwarded from the device under test to the radio communication tester. A pre-equalization matrix is determined by the radio communication tester, wherein the reference signal received power per branch measurement values and presence of additive white Gaussian noise (AWGN) are taken into account when calculating the pre-equalization matrix. The pre-equalization matrix compensates cross-talk between the at least two channels and balances the branches such that the device under test receives equal power at its reception antennas. Further, a test setup is described.