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Simulation of LTE transmitter in SpectreRF (Read 275 times)
RFn00b
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Simulation of LTE transmitter in SpectreRF
Oct 01st, 2018, 4:40pm
 
I noticed that MMSIM in SpectreRF offers some new modulated sources for many wireless standards, such as LTE, WiLAN, Bluetooth, etc., under the rfLib library. I read the documentation examples and managed to simulate the EVM, spectrum, and constellation diagram of a behavioral transmitter frontend using the passband models. This was done by using the new "wireless" option under the envelope analysis simualtion. My question, however, is the following:

Can I use the wireless analysis to simulate an entire transmitter (DAC, baseband filter, upconverter, and PA) at transistor level with an LTE signal as the input? As far as I know, the common way is to simulate a very long transient using pwl sources with the signal generated in MATLAB, and post-process the results from SpectreRF in MATLAB to generate EVM, constellations, etc. Unfortunately, this method takes too long (especially post-layout). So, I was wondering whether there's a faster alternative to get a feeling of my LTE transmitter performance at transistor level.

Thank you for your time  :)
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Andrew Beckett
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Re: Simulation of LTE transmitter in SpectreRF
Reply #1 - Oct 21st, 2018, 4:53am
 
The baseband filter, upconversion mixer and PA should be OK, but I think the DAC is likely to be a problem.

The best thing would be to contact Cadence customer support at http://support.cadence.com so that an application engineer can take a look at what your circuit looks like in more detail, and maybe make some suggestions as to how best to simulate it.

Kind Regards,

Andrew.
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RFn00b
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Re: Simulation of LTE transmitter in SpectreRF
Reply #2 - Oct 21st, 2018, 6:47am
 
Thank you for your suggestion. Unfortunately, I'm a university student and I don't know the HostID and RefKey to access Cadence support page. Is there a way through our university's technical liaison?
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Andrew Beckett
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Re: Simulation of LTE transmitter in SpectreRF
Reply #3 - Oct 21st, 2018, 2:22pm
 
Yes, you should be able to do it that way (or if under the Europractice scheme, you can contact Europractice who in turn can contact Cadence).

Regards,

Andrew
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