Seperation at PHY layer?

[Alan Birchler]

Hello everyone,

From my understanding of radio technology, an antenna will not be able to transmit nor receive signals from two different sources if those sources are communicating on vastly different frequency ranges since a single antenna element cannot resonate efficiently in such a situation. If this assumption is correct, then in 5G-LENA if I configure two bands on a gNodeB that are in different frequencies (almost 5000MHz apart), does the simulation integrate PHY layer separation where certain antennas will be dedicated to one band and others for the second band? Is this something that needs to be configured on our end?

Best regards,

Alan Birchler De Allende

[Gabriel Ferreira]

> does the simulation integrate PHY layer separation where certain antennas will be dedicated to one band and others for the second band?

Yes, each band is simulated in a separate multimodel spectrum channel, so they must be orthogonal. Each band, in our case a BWP, will have its own dedicated antennas, PHY and MAC.

>  Is this something that needs to be configured on our end?

Yes, the list of non-overlapping BWPs, which you pass to gNB and UE to configure them. In examples, you can find it as ``allBwps``.

[Alan Birchler]

Hi Gabriel,

Thanks for the prompt reply!

So just to make sure that I'm understanding with a simple example, let's say I have 4 BWPs configured in a gnodeb. In my gnodeb I also have it configured with 4x4 antennas. So based on what you said, each BWP will be configured with its own MAC layer (i.e. each BWP will get its own AMC model, Scheduler model, etc.) its own PHY layer (i.e. each will get its own HARQ model, etc.), and a section of the 4x4 antennas (i.e. 2 antennas per BWP) to transmit and receive data?

-- Alan