Multiple-input multiple-output over the air performance testing

Patent metadata

Field	Value
Publication number	US-12425110-B2
Application number	US-202017756692-A
Country	US
Kind code	B2
Filing date	Jan 6, 2020
Priority date	Jan 6, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a testing equipment may transmit a set of test signals to a device under test (DUT) from a plurality of directions relative to the DUT; obtain, from the DUT, a set of measured multiple-input multiple-output (MIMO) sensitivity results based at least in part on the set of test signals; and determine a MIMO over the air (OTA) performance of the DUT based at least in part on a single measured MIMO sensitivity result of the set of measured MIMO sensitivity results or an average of MIMO sensitivity results, in a subset of the set of measured MIMO sensitivity results, that satisfy a threshold percentile. Numerous other aspects are provided.

First claim

What is claimed is:

1. A method performed by a testing equipment, comprising:
transmitting a set of test signals to a device under test (DUT) from a plurality of directions relative to the DUT;
obtaining, from the DUT, a set of measured multiple-input multiple-output (MIMO) sensitivity results based at least in part on the set of test signals; and
determining a MIMO over the air (OTA) performance of the DUT based at least in part on an average of a linear scale of a subset of the set of measured MIMO sensitivity results, the subset selected based at least in part on a threshold percentile.

2. The method of claim 1 , wherein determining the MIMO OTA performance of the DUT comprises:
determining whether the DUT satisfies a MIMO OTA performance parameter based at least in part on whether the average of the MIMO sensitivity results satisfies a threshold MIMO sensitivity for the MIMO OTA performance parameter.

3. The method of claim 1 , further comprising:
selecting the threshold percentile based at least in part on a power class of the DUT.

4. The method of claim 1 , further comprising:
selecting the plurality of directions relative to the DUT based at least in part on satisfaction of a spherical coverage parameter.

5. The method of claim 4 , wherein selecting the plurality of directions relative to the DUT comprises:
transmitting an additional set of test signals from a set of directions relative to the DUT;
obtaining, from the DUT, a set of measurements of receiver sensitivity of the DUT for the set of directions based at least in part on the additional set of test signals; and
selecting the plurality of directions relative to the DUT based at least in part on a determination that corresponding measurements of receiver sensitivity of the DUT satisfy the spherical coverage parameter.

6. The method of claim 1 , further comprising:
selecting the plurality of directions relative to the DUT based at least in part on a transmitting power map of the DUT.

7. The method of claim 6 , wherein selecting the plurality of directions relative to the DUT:
transmitting, to the DUT, a first set of signals to initiate transmitting power map training for the DUT;
receiving, from the DUT, a second set of signals;
determining, based at least in part on the second set of signals, the transmitting power map of the DUT; and
selecting, based at least in part on the transmitting power map of the DUT, the plurality of directions relative to the DUT for testing MIMO OTA performance of the DUT.

8. The method of claim 1 , wherein the subset of the measured MIMO sensitivity results comprises K sensitivity results, and wherein the method further comprises:
computing the average according to:

S
X

=

1
⁢
0
⁢

log
[

K

∑

i
=
1

K

⁢

1

10

P
i

10

]

,

wherein P i is a measured MIMO sensitivity result in the subset.

9. A testing equipment for wireless communication, comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to:
transmit a set of test signals to a device under test (DUT) from a plurality of directions relative to the DUT;
obtain, from the DUT, a set of measured multiple-input multiple-output (MIMO) sensitivity results based at least in part on the set of test signals; and
determine a MIMO over the air (OTA) performance of the DUT based at least in part on an average of a linear scale of a subset of the set of measured MIMO sensitivity results, the subset selected based at least in part on a threshold percentile.

10. The testing equipment of claim 9 , wherein the one or more processors, to determine the MIMO OTA performance of the DUT, are configured to:
determine whether the DUT satisfies a MIMO OTA performance parameter based at least in part on whether the average of the MIMO sensitivity results satisfies a threshold MIMO sensitivity for the MIMO OTA performance parameter.

11. The testing equipment of claim 9 , wherein the one or more processors are configured to:
select the threshold percentile based at least in part on a power class of the DUT.

12. The testing equipment of claim 9 , wherein the one or more processors are configured to:
select the plurality of directions relative to the DUT based at least in part on satisfaction of a spherical coverage parameter.

13. The testing equipment of claim 12 , wherein the one or more processors, to select the plurality of directions relative to the DUT, are configured to:
transmit an additional set of test signals from a set of directions relative to the DUT;
obtain, from the DUT, a set of measurements of receiver sensitivity of the DUT for the set of directions based at least in part on the additional set of test signals; and
select the plurality of directions relative to the DUT based at least in part on a determination that corresponding measurements of receiver sensitivity of the DUT satisfy the spherical coverage parameter.

14. The testing equipment of claim 9 , wherein the one or more processors are configured to:
select the plurality of directions relative to the DUT based at least in part on a transmitting power map of the DUT.

15. The testing equipment of claim 14 , wherein the one or more processors, to select the plurality of directions relative to the DUT, are configured to:
transmit, to the DUT, a first set of signals to initiate transmitting power map training for the DUT;
receive, from the DUT, a second set of signals;
determine, based at least in part on the second set of signals, the transmitting power map of the DUT; and
select, based at least in part on the transmitting power map of the DUT, the plurality of directions relative to the DUT for testing MIMO OTA performance of the DUT.

16. The testing equipment of claim 14 , wherein the subset of the measured MIMO sensitivity results comprises K sensitivity results, and
wherein the one or more processors are configured to:
compute the average according to:

S
X

=

1
⁢
0
⁢

Assignees

• Qualcomm Inc

Inventors

• Han Bin
• Cao Yiqing
• Li Yan

Classifications

• H04W52/265

  taking into account the quality of service QoS · CPC title

• H04B7/0426

  Power distribution · CPC title

• H04B17/26

  using historical data, averaging values or statistics · CPC title

• H04B17/203

  Receiver sensitivity · CPC title

• H04B17/0085 Primary

  using test signal generators · CPC title