Practical MU-MIMO testing of multiple WiFi6 wireless routers

Practical MU-MIMO testing of multiple WiFi6 wireless routers

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Bought Qualcomm WiFi6 wireless network card QCA6391 wireless network card, a total of three, bought the main purpose is to test the effect of MU-MIMO in WiFI6 mode. I received the goods and AX200 to do a simple comparison of speed measurement, the results are faster than AX200 at 80MHz bandwidth.

The WIFI module chip of Xiaomi 10 cell phone is also QCA6391, if two QCA6391 support MU-MIMO, then a QCA6391 + Xiaomi 10 should also support, if also support, it proves that Xiaomi 10 is to support the WIFi6 under the MU-MIMO. old before the test Xiaomi 10 + Apple SE2 is not supported, if Xiaomi 10 support, then it can prove that Apple SE2 is 100% does not support MU-MIMO, if Apple 12 WIFI module along 11, then Apple 12 is also does not support MU-MIMO.

The test router is not only the five models under the table, because the background cloth can not accommodate all.


The models that participated in the test included the Asus AX86U, TP-LINK’s XDR6060, XDR6030, XDR5430, XDR3230, Xiaomi AX3600, and Redmi AX6, containing Qualcomm, Broadcom, and MTK chips. All of these wireless routers are 4T4R for 5G, so what about the other Asus TUF-AX3000 which is not eligible for testing, it is not 4T4R.

Some people say that the 4x4mimo wireless router only supports up to two 2x2mimo running in MU-MIMO mode, which is very big mistake, not only one person asked me this question, maybe too much information on the Internet without real-world testing just say it, this article can also be a good real-world testing of this issue.

MU-MIMO is a complex thing, wireless transmission is more erratic, if you want to make the wireless work steadily, only wireless to wired, using wires as the medium of transmission, which will be able to each test results consistent and not affected by environmental interference. The following chart of the method.


It’s a pity that I found out that I bought the wrong connector when I took out the photo.


But the test MU-MIMO is tested in a real environment, not with the device in the picture above connected to a wireless card. The above stuff is just for show.

XDR6060 and AX86U have 2.5G network port, this is very simple, as long as a network card connected to it can be tested, the other are all gigabit network port, you can only use the computer’s multiple network ports all connected to the LAN port of the router.

MIMO means multiple-input multiple-output, which can be interpreted as spatial streams. 2x2mimo is 2 spatial streams, 3x3mimo is 3 spatial streams, 4x4mimo is 4 spatial streams, if the maximum rate of a spatial stream is 433Mbps, then the maximum rate of 2x2mimo is 866Mbps, 3x3mimo is 1.3Gbps, and 4x4mimo is 1.3Gbps. 4x4mimo has a maximum rate of 1.7Gbps.

MU-MIMO is relative to the normal SU-MIMO mode, which does not support MU-MIMO is SU-MIMO. to put it mildly, in SU-MIMO mode, no matter how many 2x2mimo receiving devices are transmitting at the same time, the total wireless speed of the wireless router will not exceed the maximum speed of a single 2x2mimo of about 650Mbps. If MU-MIMO is supported, the total wireless speed will significantly exceed 650Mbps.

Examples of later test comparisons.

In the two 2x2mimo cell phone test, support for MU-MIMO mode will enable the wireless router to reach 1141Mbps speed, while not supporting MU-MIMO or only 645Mbps in SU-MIMO. this is the direct effect of MU-MIMO.

Above is the MU-MIMO test of the Netgear R9000 WiFi5 wireless router.

I have summarized the test results of all WIFi6 routers into the following table. The data was also tested with MU-MIMO turned off, so that you can clearly have a comparison.

Test software is used IxChariot software, ten threads, hit the flow time of one minute, the speed measurement results are an average, not peak, but each data is the maximum value taken out of multiple consecutive tests, according to personal experience in testing MU-MIMIO, placed in different positions and antennas to get better quality results.

The firmware version of the wireless router to be tested in the future.


XDR6060: 1.1.12

Redmi AX6: 1.0.18

Xiaomi AX3600: 1.0.67

XDR6030: 1.0.4

XDR5430: 1.0.5

XDR3230: 1.0.5

Both the QCA6391 and Xiaomi 10 are 2x2mimo with a connection rate of 1201Mbps and a maximum wireless speed of about 930Mbs for a single unit in close proximity. If you go below this result you don’t support MU-MIMO.

two QCA6391 is two 2x2mimo.

QCA6391 + Xiaomi 10 is also two 2x2mimo.

two QCA6391s + Xiaomi 10s are three 2x2mimos.

three QCA6391s are three 2x2mimo.

Three QCA6391 + Xiaomi 10 is four 2x2mimo.

The following table shows the results of MU-MIMO measurements: (5G DL MU-MIMO)



From the results you can see that the Xiaomi AX3600 and Redmi AX6 and Asus AX86U are supporting MU-MIMO under WiFi6, and the Xiaomi 10 phone is also supporting MU-MIMO under WIFI6.

When there are four 2x2mimo simultaneous transmission, MU-MIMO also has an effect, so those who say 4 × 4 routing only supports a maximum of two 2 × 2 receiving devices running in MU-MIMO mode is a very wrong statement.

Qualcomm’s MU-MIMO, MU-MIMO effect drops significantly when the device reaches four, while the Asus AX86U of Broadcom solutions can reach the highest value at four, but the lowest effect at two. Asus AX86U in WIFi5 mode is not supported MU-MIMO, but in WIFi6 it is supported, there is an improvement.

But then, ASUS AX86U in the off MU-MIMO mode (the default setting is off), the total wireless throughput rate is very low very low, than the use of the same wireless chip XDR6060, XDR6030, XDR5430 also low.

I can’t imagine that TPLINk’s XDR6060 does not support MU-MIMO, including the XDR6030 and XDR5430.

XDR3230 is MTK’s latest 4x4mimo WIFi6 solution, but it doesn’t support MU-MIMO from the real test.

None of these TPLINK models can support MU-MIMO in WiFi6 mode. Driver issues ?????? Optimization issues??? Money issues, Broadcom does not open MU-MIMO for you? Broadcom has a hand in tplink? I don’t understand.

The result is simply the following table.

MU-MIMO实测 02

Two 2x2mio MU-MIMO effect can have a maximum of more than 1400Mbps, but much because of the time fluctuations behind the unstable, so let the results down, it is difficult to measure the stable data flow in a minute, as follows


Asus AX86U somehow where pumped, three QCA6391 plus a Xiaomi 10 phone, MU-MIMO effect can reach 1340Mbps, after several consecutive tests are not as high as this. The following figure.

AX86U 三台QCA6391+小米10

The Intel AX200 and Apple SE2 do not support MU-MIMO under WiFi6, so they were previously tested with the wrong equipment and came up with the fallacy that they don’t support it, until this QCA6391 wireless card arrived and verified it all. Although QCA6391 expensive, it is still worth it for me. But it is not recommended to get a WiFi6 wireless card without 160MHz bandwidth, unless it is very cheap.

This concludes the MU-MIMO hands-on test. Those who are interested can take a closer look at the data and can come up with some other questions.

Additional information.

This article has a large error in the understanding of MU-MIMO, as follows.
1. for 4 * 4 support MU-MIMO AP, the number of MU-MIMO clients it supports is generally limited only by the local band capacity, there is no question of how many clients are specifically supported. Assuming there are five 2 * 2 and five 1 * 1 clients, the AP will be divided into different MU-MIMO groupings according to the location and the number of MIMO devices, the sum of the number of MIMO clients in each grouping must be less than or equal to 4, the MU-MIMO mode has four 1 * 1, two 2 * 2, two 1 * 1 + 1 2 * 2 and other combinations of mode.
2. The MU-MIMO function is not judged by whether it is supported or not, but by the MU-MIMO gain. In the simplest case, i.e., the case of two 2*2 client devices, the MU-MIMO gain is the performance of the test with MU-MIMO support turned on divided by the performance of the test without MU-MIMO support turned on. General gain of 1.5 or more can be considered MU-MIMO effect is better, if greater than 1 and less than or equal to 1.2, MU-MIMO effect can be considered general, and less than or equal to 1 is not supported or negative effect.


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