drowe67

Note for FreeDV PLT - no further action on this from FreeDV team members as 700D will soon be obsolete.

Thanks for your analysis @jg1uaa. Can you please tell me how you are using LPCNet? We have found that FreeDV 2020 is not very robust to HF channels, and is...

Hi Mike, yes it's possible, I do something similar with the HackRF (see README and service scripts). Pipe the IQ output of `fsk_mod` to a LimeSDR-mini command line tool (although...

@DJ2LS - I'm jumping the gun on Feature Request 002, just 30 minutes work to get the ball rolling. Pls take a look at the waveform design and tell me...

> So we are using a 128_56 ldpc code, isnt this resulting into 7bytes frame payload, resulting into 7 bytes - 2 bytes CRC = 5 bytes payload? ( I'm...

@DJ2LS - there's a first pass C port to the FreeDV API level that's working for me, although I haven't tested performance yet. TODO list at the top shows status.

@DJ2LS - I've plotted some PER curves (100 packets), datac14 in black, datac13 in magenta. It looks like datac14 is a few dB worse in performance, probably due to the...

Octave clipper adjust notes 1. without clipping: ``` ofdm_ldpc_tx("test_datac14.raw","datac14",1,-2,"mpp","bursts",100) Npackets: 1 Nbursts: 100 Peak: 16384.00 RMS: 5261.06 CPAPR: 9.87 clipped: 0.00% ofdm_ldpc_rx("test_datac14.raw","datac14","packetsperburst",1) Raw BER..: 0.0493 Tbits: 12544 Terrs: 619 SNR3k:...

Recomputed the PER v SNR curves, after clipping adjustment. Similar to above, good check to make sure performance hasn't changed much. However we can now achieve a few dB higher...

@DJ2LS - I think I've completed all of the agreed tasks: 1. Pls let me know if I've missed something. 1. Pls try a basic functional test just to make...