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Method and test device for determining pre-equalization matrix

A pre-equalization, matrix technology, applied in transmission monitoring, electrical components, transmitter monitoring, etc., can solve the problem of time-consuming conception

Pending Publication Date: 2022-05-06
ROHDE & SCHWARZ GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the concepts known in the prior art are very time-consuming, since the channel matrix must be determined and inverted, which may require a mathematically complex process

Method used

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  • Method and test device for determining pre-equalization matrix
  • Method and test device for determining pre-equalization matrix
  • Method and test device for determining pre-equalization matrix

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Embodiment Construction

[0061] The detailed description set forth below in conjunction with the accompanying drawings, in which like reference numerals refer to like elements, is intended as a description of various embodiments of the disclosed subject matter and is not intended to represent the only embodiment. Each embodiment described in this disclosure is provided by way of example or illustration only, and should not be construed as preferred or superior to other embodiments. The illustrative examples provided herein are not intended to be exhaustive or to limit claimed subject matter to the precise forms disclosed.

[0062] For the purposes of this disclosure, the phrase "at least one of A, B, and C" means, for example, (A), (B), (C), (A and B), (A and C), (B and C ) or (A, B and C), when listing more than three elements includes all other possible permutations. In other words, the term "at least one of A and B" generally means "A and / or B", ie "only A", "only B" or "A and B".

[0063] exist ...

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Abstract

The invention provides a method for determining a pre-equalization matrix and a testing device. A radio communication tester having a base station emulator and a channel emulator is provided. A device under test having at least two branches is provided. An NxM multiple-input multiple-output (MIMO) connection is established between a radio communication tester and a device under test. The NxM MIMO connection comprises at least two channels. The per-branch reference signal received power measurements are continuously forwarded from the device under test to the radio communication tester. A pre-equalization matrix is determined by a radio communication tester, wherein the presence of per-branch reference signal received power measurements and additive white Gaussian noise (AWGN) is taken into account in calculating the pre-equalization matrix. The pre-equalization matrix compensates for crosstalk between the at least two channels and balances the branches such that the device under test receives equal power at its receiving antenna.

Description

technical field [0001] The invention relates to a method for determining a pre-equalization matrix to be used for testing. Further, the invention relates to a testing device for testing a device under test. Background technique [0002] Over-the-air (OTA) measurements of a device under test in which a pre-equalization matrix is ​​determined are known in the prior art. Then, a pre-equalization matrix is ​​applied in order to pre-equalize the radio channel established between the radio communication tester and the device under test. Thus, the signal output by the radio communication tester is adapted by means of a pre-equalization matrix such that the signal received by the device under test is already equalized. In fact, the pre-equalization matrix and the channel matrix (also known as the transfer matrix) compensate each other, where the channel matrix describes the effects occurring in the radio channel established between the device under test and the radio communication...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/0413H04W24/06H04W24/02
CPCH04B7/0456H04B7/0413H04W24/06H04W24/02H04B17/12H04B17/318H04B17/3911H04B17/0085
Inventor 海因茨·梅莱因欧赛玛·哈古埃姆
Owner ROHDE & SCHWARZ GMBH & CO KG
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