Hello folks,
I am attempting to transmit a bit stream from one bladeRF to
another bladeRF using an SMA cable from the Tx output to the Rx input of
the other. For simplicity's sake, I'm transmitting a finite bit stream
of 1's (not ASCII 1's), and setting the File Source to not repeat
itself.
I started by modifying
../gr_digital/examples/demod/dpsk_loopback.grc to a Tx/Rx setup as
follows. I am trying to get the bladeRFs communicating at 'baseband'
before moving on to OFDM transmission.
Tx.grc:
http://pastebin.com/HFFtXuHWRx.grc:
http://pastebin.com/hFRTZsm3
I've noticed, when using a hex editor to compare the files at each respective stage, namely that iq_in does not match iq_out.
On that note, are there any simple examples (.grc) on how to
time tag IQ samples output from the bladeRF? At the moment, I'm naively
searching for finite strings based on the iq_in generated from the DPSK
Mod block in Tx.grc, so I don't really know if I'm comparing the right
samples at each time instance.
Am I missing something elementary in my setup or do I have to use channel coding to prevent errors in transmission?
I do apologize if I'm being fairly thick; I'm fairly new to DSP, SDRs and Gnuradio.
Regards,
Kamarisam
P/S: Apologies if you're receiving this email twice.