Patent
Over the air Calibration and Testing of Beamforming-Based Multi-Antenna Devices in Anechoic and Non-Anechoic Environments
TLDR
In this article, a method for wirelessly calibrating/testing RF and digital components of a multi-antenna device under test includes the step of wirelessly transmitting a first signaling information between the device under-test and a device tester, indicating a calibration request.Abstract:
A method for wirelessly calibrating/testing RF and digital components of a multi-antenna device under test includes the step of wirelessly transmitting a first signaling information between the device under test and a device tester, the first signaling information indicating a calibration request, wherein the first signaling information is transmitted by the device under test or the device tester Further, the method includes the step of estimating, in response to the first signaling information, channel transfer function matrices between active antenna ports/RF ports of the device under test and antenna ports of the device tester using reference signals wirelessly transmitted between the device tester and the device under test or vice versaread more
Citations
More filters
Patent
Apparatus and method for the calibration of over-the-air (ota) communication test setups
Haustein Thomas,Landmann Markus,Grossmann Marcus,Leather Paul Simon Holt,Raschkowski Leszek,Askar Ramez +5 more
TL;DR: In this article, an apparatus (100) is configured to determine a calibration information on the basis of a signal which is wirelessly transmitted by the apparatus(100) during a transmission of test information to the wireless device (105) under test or which is wired wired up by the wireless devices (105).
Patent
System, test setup as well as method for performing MIMO tests
Gallhauser Markus,Voss Nino +1 more
TL;DR: In this paper, a system for performing multiple input/multiple output tests on a device under test has a central control unit and at least two antenna modules connected to the central controller via a signal line, wherein the antenna modules comprise a radio-frequency antenna, a signal generation unit and one power measurement unit.
References
More filters
Journal ArticleDOI
A Generalized inverse for matrices
TL;DR: A generalization of the inverse of a non-singular matrix is described in this paper as the unique solution of a certain set of equations, which is used here for solving linear matrix equations, and for finding an expression for the principal idempotent elements of a matrix.
Patent
Method for determining beamforming parameters in a wireless communication system and to a wireless communication system
TL;DR: In this article, a method for determining a beamforming vector or channel matrix in a communication system including a transmitting station and a receiving station, and communication system, is described, where the transmitting and receiving stations include respective antenna groups and respective codebooks include a plurality of predefined beamforming vectors for the antenna group.
Patent
Method and device for testing performance of wireless terminal
TL;DR: In this article, a method and a device for testing a performance of a wireless terminal and a computer readable storage medium are provided, where the wireless terminal is placed in a first anechoic chamber and comprises m antennas, where m is a positive integer greater than 1.
Proceedings ArticleDOI
MIMO over-the-air testing for electrically large objects in non-anechoic environments
Christopher Schirmer,Mario Lorenz,Wim A. Th. Kotterman,Rainer Perthold,Markus Landmann,Giovanni Del Galdo +5 more
TL;DR: In this paper, the authors present a coexistence test for advanced communication systems such as C2C, C2I, and mobile and in-car communication systems under realistic conditions.
Patent
Systems and methods for beamforming measurements
David J. Wicker,Lester Noel Stott,Jeffrey Dean Marker,Alexander David Rekow,Thomas Alexander +4 more
TL;DR: In this article, a test system containing an integrated MIMO signal analyzer is described that includes a protocol engine operative in conjunction with a waveform generator and waveform analyzer that analyzes the signal waveform of a device under test.