Hello, I'm trying to implement a burst transmitter with the B205-mini. I would like to set it to transmit a sine wave, phase modulated wave, or arbitrary waveform for a given duration and stop for set duration. Repeat for several bursts and then terminate program. It is crucial that the bursts are in-phase with each other across bursts and initializations.
On the receiver side I am hoping to use a B210 to receive the bursts and record only the burst data. It appears the Tagged File Sink within GNU Radio is ideal for this. I would like to tag the burst ON data from the transmitter side and have the receiver begin saving only those data. I have simulated that using GNU Radio only and it works fine (see pulsed_signal_simulation.grc). However, when I try to implement the same thing using USRP (B205-mini) I see no tags on the receiver side (see pulsed_signal_SDR.grc). As you can see, the signal is indeed pulsed at a duty cycle/rate that I choose and is phase-consistent. The B205-mini was set in loopback mode for my tests. Questions: 1. How does one set a tag using a USRP? I tried setting tx_sob and tx_eob tags using similar methods and I could not get those to work either. Can one do this in GRC? 2. Is it possible to set "custom" tags such as "burst" in UHD? Alternatively, can I define another custom tag and then modify the Tagged File Sink to parse for that tag and only save those data? Sorry for the long email. Thanks in advance. Regards, Krishna Makhija
pulsed_signal_simulation.grc
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pulsed_signal_SDR.grc
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