How to edit the Rx filter parameters in WLAN Toolbox in a given example.

I am working on the example named as "802.11ax Multinode System-Level Simulation of Residential Scenario". The link is

https://se.mathworks.com/help/wlan/ug/802-11ax-multinode-system-level-simulation-of-residential-scenario-using-matlab.html

I would like to change the RX flter coeffiecient.

So far, I have known that this example does not deal with adjacent channel interference. If I want to include adjacent channel interference with the filter specifications, how can I do that?

Please help me on this regard.

Answer 1

[Sachin Lodhi]

Hello MD ABDUL,

Check out this documentation which covers what you are aiming to do, except it focuses on ‘5G’. It details how to simulate and evaluate the effects of RF impairments on an IEEE 802.11ax signal that's dealing with adjacent 5G interference: https://www.mathworks.com/help/wlan/ug/modeling-and-testing-an-802-11ax-rf-receiver-with-5g-interference.html#d126e23568

You can modify your model in a similar way to add the capabilities you need. For further insight, I kindly suggest reviewing a model that demonstrates the simulation of Adjacent and Co-Channel Interference in a PSK modulated signal, which can be found at the following link: https://www.mathworks.com/help/comm/ug/adjacent-and-co-channel-interference.html

Hope this helps.

Best Regards,

Sachin

Answer 2

[Garmit Pant]

Hello Abdul,

I understand that you are working on the MATLAB example “802.11ax Multinode System-Level Simulation of Residential Scenario” and want to include adjacent filter interference in the scenario given in the example and thus are looking for a method to change the RX filter coefficients.

The example that you are working on simulates a residential scenario to model the performance of an “IEEE® 802.11ax™” network using MATLAB’s WLAN Toolbox and the Communications Toolbox Wireless Network Simulation Library. The WLAN network is formulated using “wlanNode” objects. You cannot include adjacent channel interference in the given simulation since the WLAN Toolbox supports only full-band co-channel interference modelling. It does not support modelling overlapping and adjacent channel interference. Thus, it is not possible to introduce adjacent channel interference by altering the RX filter coefficients.

For further understanding on WLAN Toolbox, you can refer to the following MATLAB Documentation:

1. Refer to ‘More About’ section of the “wlanNode” documentation to understand the assumptions and limitations of the modelling methods- https://www.mathworks.com/help/wlan/ref/wlannode.html#mw_1c86cdad-58b8-4f15-a71a-35fab1ff9255

I hope you find the above explanation and suggestions useful!