Hi Ben, I have looked at them, I recreated the fecapi_tagged_decoders example and switched to file source and file sink to send Hello World. I got that working today.
I then tried to add OFDM TX --> OFDM RX (see attached grc flow diagram), but can't get a balance between encoder frame size and number of noutput items. I either get the error "gr::log :INFO: cc_encoder1 - tried to set frame to XXX; max possible is YYY" or "thread[thread-per-block[13]: <block ofdm_carrier_allocator_cvc (16)>]: Buffer too small for min_noutput_items. I've tried increasing the minimum buffer size for the OFDM TX block, but then I get the error "gr::log :INFO: header_payload_demux0 - Detected a packet larger than max frame size" I'm going to try with a more simplistic modulation scheme like PSK or FSK when I get the chance. Thanks, Alex. On Tue, May 7, 2019 at 2:48 PM Ben Hilburn <bhilb...@gnuradio.org> wrote: > Hi Alex - > > Have you tried any of the examples in gr-fec/examples? If so and they > didn't work for you, what issues have you encountered? > > Cheers, > Ben > > On Sat, May 4, 2019 at 9:20 PM Alex Roberts <alex.robe...@ieee.org> wrote: > >> Hello GNURadio Users, >> >> I'm learning about convolutional encoders in school and would like to >> demonstrate their use in gnuradio for a presentation. The examples >> appear useful for showing BER and Encoding -> decodng, but I'm >> struggling to implement a signal chain >> >> tx_bytes --> unpacked to packed -> FEC_ENCODE -> modulation -> AWGN >> channel -> demod -> FEC_DECODE -> received_bytes >> >> I'm not sure where to put the fec_decode on receiver side or how the >> bytes need to packed to use it. Are there some tutorials or examples >> that FEC with tx to rx (either w/ hardware or loopback)? >> >> Thanks >> Alex. >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
modulation_with_cc_encoding_loopback.grc
Description: Binary data
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
