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Design >> RF Design >> how to modell the non-linear characteristics
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Message started by maomao on Jun 1^st, 2007, 8:32am

Title: how to modell the non-linear characteristics
Post by maomao on Jun 1^st, 2007, 8:32am

i am now trying to modell the non-linear characteristics of a power amplifier . can anyone give me some suggestions ?Thanks a lot

Title: Re: how to modell the non-linear characteristics
Post by Jess Chen on Jun 1^st, 2007, 11:24am

You should first ask yourself several questions before chosing a PA model:

1. What impairments do you want to simulate? Only AM/AM? AM/PM too? Memory, perhaps related to dynamic thermal effects?
2. Are you interested in a passband model or a baseband equivalent model?
3. What environment will your model operate? Spectre? Matlab? SPW? ADS? SpectreRF? SPICE?
4. What kind of modulation do you expect?
5. What sort of run times are you willing to tolerate?
6. Will you use the model for polar modulation, in which case you may want to model bias dependence too?

-Jess