There's only one physical TX LO; so either you just don't specify offsets, OR they must
add up to the difference between the two target frequencies.
In your case, the difference is 10 MHz, but your offsets don't add up to 10 MHz, and
you're requesting something impossible.
Best regards,
Marcus
On 06.12.22 12:45, 能书能言 wrote:
Hi,
I am using OFDM + USRPB210 for data transmission. I am using two USRPB210s, one being
used as a transmitter and the other as a receiver. When I use only one of the channels
(RFA or RFB) the data can be transmitted properly. I needed to transmit two different data
at the same time, so I used both the USRP RFA and RFB. the baseband processing part of the
link was the same for both channels (including channel coding, modulation, FFT, etc.), but
at this point I found that I was transmitting data with a very high BER (for both links).
again, mentioning that there was no problem when sending on one channel alone, I The USRP
Sink and Source settings are shown in the attached picture.
where
freq1=2.4G
freq2=2.39G
lo_off1=2M
lo_off2=-2M
samp_rate=300K
The two signals are separated using different frequencies, I don't think there should
be any interference between them, and I have troubleshot errors other than USRP source and
sink, so I think there is something wrong with my parameter settings, or I am using the
two RF channels in an incorrect way. How should I modify this?Looking forward to your
response！
Best Regards!
