[USRP-users] Re: How to receive the output of B210 Tx's PA?

2021-10-19 Thread Ron Economos
It depends on the exact parameters of the signal you're transmitting, especially PAPR (Peak to Average Power Ratio). Here are some spectrum analyzer plots for a wideband digital signal. The B210 gains are set to 78, 83 and 85. Note that a 2 dB increase from 83 to 85 causes a 10 dB increase in I

[USRP-users] Re: How to receive the output of B210 Tx's PA?

2021-10-19 Thread Marcus Müller
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 th

[USRP-users] How to receive the output of B210 Tx's PA?

2021-10-19 Thread fan
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 non