Hi, I'm Alejandro, an engineer with National Instruments.
And today I want to show you how to use the Vector Signal
Transceiver and the NI Wireless Lan Measurement Suite
to generate and analyze a two by two 808.11ax signal.
In my PXI setup, I have two Vector Signal Transceivers.
The Vector Signal Transceiver is an instrument
that allows me to both generate and analyze wideband RF
signals.
So here I can generate a two by two 802.11ax MIMO signal.
Now let's take a look at the software.
I have here the wireless Lan Generation Soft Front Panel,
an interactive tool that allows me to control all aspects
of the 802.11ax generation.
For example, I have control of both generators here.
I can configure the channel to be 80 megahertz.
And I can define the type of PPDU that I'm generating.
In this case, it's a multi-user PPDU.
And I have the complete flexibility
to change the OFDA allocation for multi-user operation.
In this case, I've chosen to split up the first 20 megahertz
of the channel into nine users.
It also gives me the flexibility to indicate
the type of modulation encoding set that I
want to use for each one.
So I've chosen both BPSK for the first nine users
and 1024-QAM for the last three users.
As soon as I close that, the sofeware panel
begins to download the waveform to the Vector Signal
Transceivers to generate the stimulus signal that I'm going
to present to the analyzer.
Let's go now to the Analysis Soft Front panel.
The generator is already generating the waveform
that we configured.
Now the analyzer is automatically detecting
the type of packet that it is receiving, in this case,
an 802.11ax packet with multiple users that we can see here.
So here is the allocation divided
into nine users for the first 20 megahertz and then
the three additional users taking each 20 megahertz.
It also shows me the constellation, 1024-QAM.
The Soft Front Panel allows me to see different types
of measurements.
For example, we're looking here at the modulation quality
of the 1024-QAM signals.
But I can also select Transmitted Power
or Spectral Measurements.
You can also extend this capability
to test, validate, and characterize
your devices with the full API.
To learn more, visit ni.com/vst.