NRF7002 and MU-MIMO

RE: NRF7002 and MU-MIMO

AHaug — Wed, 08 Jan 2025 08:29:15 GMT

Hi,

Please raise a new discussion for your inquiry. I will close this case shortly since this discussion is over 6 months old

Kind regards,
Andreas

RE: NRF7002 and MU-MIMO

ChengQing Zhao — Wed, 08 Jan 2025 06:18:04 GMT

how to enable or disable the OFDMA function by the nRF7002? is there some API?

RE: NRF7002 and MU-MIMO

AHaug — Tue, 09 Jul 2024 08:04:06 GMT

Hi again,

I had to discuss this with some of my colleagues first, but here's what they said regarding the nRF7002 being compatible with access points using MU-MIMO:

MU-MIMO is a technique for concurrent operation between an AP and multiple STAs. So is OFDMA. Both are MU techniques. APs can choose to use one or the other or even a combination of both techniques depending on the capabilities of the connected STAs and traffic. We declare that we do not support MU-MIMO, so when the AP wishes to communicate data with us it cannot utilize the MU-MIMO technique It can either use OFDMA, or simply revert to TDMA. When there is nothing to transmit to our STA it may choose to utilize MU-MIMO.

Does this resonate with you and answer your question?

Kind regards,
Andreas

RE: NRF7002 and MU-MIMO

Adam M — Mon, 08 Jul 2024 16:16:55 GMT

Thanks for the fast reply Andreas.

I guess the question is if it is compatible with the access point using MU-MIMO. As it has 1 antenna only I know it cannot do multiple spatial streams at the same time to the device, but more if for instance a 4 spatial stream access point can talk to it using 1 stream while simultaneously using the other 3 streams to talk to other devices. It isn't clear if this requires special support on all devices, or only at the AP end.

RE: NRF7002 and MU-MIMO

AHaug — Mon, 08 Jul 2024 15:46:29 GMT

Hi,

First thing that I've uncovered is that this link attempts to describe that MU operation can be achieved through two separate mechanisms, OFDMA and MIMO. Our device only supports the OFDMA mechanism for MU operation.

Let me know if this answers your question

Kind regards,
Andreas

RE: NRF7002 and MU-MIMO

AHaug — Mon, 08 Jul 2024 14:09:26 GMT

Hi,

I will have to look closer into the nRF7002 PS myself. I find one hit under https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/protocols/wifi/wifi.html#physical_layer for Multuser support in WiFi 6 so I assume it is supported, but I will verify.

I will get back to you later this week

Kind regards,
Andreas