Dear mailing list subscribers,
This is an update to my progress on the BPSK ISI problem. Please see the link below for reference.
I attached my grc file. I removed the burst shaper block as suggested by Marcus. And the ISI is gone, in simulation, as you can see in the second attachment. I don't know why and I would like to know more about it. Does anyone can share his opinion please?
I tested the program on my USRP X310. Single USRP, tx and rx ports connected by a cable and a 30dB attenuator. The intermittent ISI is there, mocking me, as shown by the third attachment. Because I don't know in the first place what is the cause for this problem, I don't know how to solve it. My USRP is not tuned. Maybe tuning can make a difference?
Regards,
Edwin
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