Hi fan, In 2020, Alekh Gupta wrote a predistortion module for exactly that purpose.
https://github.com/gnuradio/gr-dpd Your questions regarding gain make no sense, because the whole point of nonlinearity is that you can't represent it as a single gain number, so you might need to read up on the theory a bit more! All the questions you're asking about "how do I do it" are answered in Week 1 to 13 of Alekh's blog: https://grdpd.wordpress.com/ Best regards, Marcus On 19.10.21 11:09, fan wrote: > Hi，everyone.I am trying to study how to pre distort the signal on b210 to > eliminate the > error of nonlinear PA. Before that, I need to determine: does the TX PA of > b210 have > nonlinear characteristics (when TX gain is too high, the signal amplitude > will be > limited below 1. Is this becausof its nonlinearity)? If yes, what value is > the TX gain > set to when TX PA is nonlinear? How do I get the output value of PA? (connect > TX port > and Rx port with a SMA cable and observe the input of RX?) > > > > > > > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ USRP-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
