Method and apparatus for multiple-input multiple-output (MIMO) testing user equipment (UE)
AssigneeKeysight Technologies, Inc.
InventorsHuaizhi Yang, Ya Jing, Jin-Ming Zhao, Zi Quan Bai
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Abstract
A system, device and method for optimization of a radiated transmission matrix by the selecting probe antennae and applying a compensation network in the test system are described. Among other benefits, the anechoic chamber in which the DUT is disposed is comparatively small and inexpensive. The time-consuming process of inverse matrix tuning or isolation level checking that plagues known systems, device and methods of testing DUT is substantially avoided. Because of small size of shield box and probe antenna selection algorithm, low path loss and acceptable power in testing can be realized.
Claims20
An apparatus for testing a wireless device, comprising:
- a test fixture adapted to receive the wireless device, the text fixture comprising N probe antennas, wherein N is a positive integer;
- a channel emulator adapted to provide test signals to M test antennae, wherein M is a positive integer;
- a user interface adapted to select a subset L of the M test antennas, wherein L is a positive integer;
- a processor;
- a memory that stores instructions, which when executed by the processor, cause the processor to:
- determine a transmission matrix for the subset L test antennas and the N probe antennas;
- apply a cost function for each transmission matrix;
- select a transmission matrix based on the cost function;
- and
- perform a test on the wireless device of selected metrics.
A tangible, non-transitory computer readable medium (CRM) that stores instructions for testing a wireless device, wherein when executed by a processor, the instructions cause the processor to:
- determine a transmission matrix for a subset L of test M antennae and N probe antennas, wherein L, M and N are positive integers;
- apply a cost function for each transmission matrix;
- select a transmission matrix based on the cost function;
- and
- perform a test on the wireless device of selected metrics.
Dependencies are inferred from the claim text.