Re: [Discuss-gnuradio] Firs byte always missing on TCP BPSK encoder
It seems your per-packet payload is but 1; and it's quite probable the first packet gets lost in trying to synchronize, which would explain your loss. Best regards, Marcus On 22.07.2015 19:20, Jason Matusiak wrote: I have a BPSK modulator/demodulator simulator script (attached) that has me a little perplexed. I have a TCP source on the input and a TCP sink on the output. The Encoder is setup for a payload length of 1. Everything works except that I seems to always lose the first byte. What I do is run the script and then run: nc localhost 6 in one terminal and nc localhost 60001 in another If I type, this is a test in the first terminal (minus the quotes) and hit enter, I see his is a test in the second terminal. So it looks like things are working, but why would I be losing that first byte? It seems to happen every time I start the script fresh. ___ 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
Re: [Discuss-gnuradio] Firs byte always missing on TCP BPSK encoder
It's been my experience that the packet decoder block always loses 1 payload length. Logan Washbourne Electrical Engineering Graduate Student (Electromagnetics) On Wed, Jul 22, 2015 at 12:23 PM, Marcus Müller marcus.muel...@ettus.com wrote: It seems your per-packet payload is but 1; and it's quite probable the first packet gets lost in trying to synchronize, which would explain your loss. Best regards, Marcus On 22.07.2015 19:20, Jason Matusiak wrote: I have a BPSK modulator/demodulator simulator script (attached) that has me a little perplexed. I have a TCP source on the input and a TCP sink on the output. The Encoder is setup for a payload length of 1. Everything works except that I seems to always lose the first byte. What I do is run the script and then run: nc localhost 6 in one terminal and nc localhost 60001 in another If I type, this is a test in the first terminal (minus the quotes) and hit enter, I see his is a test in the second terminal. So it looks like things are working, but why would I be losing that first byte? It seems to happen every time I start the script fresh. ___ Discuss-gnuradio mailing listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ 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
Re: [Discuss-gnuradio] Firs byte always missing on TCP BPSK encoder
OK, I think I figured it out. If I change the mod/demod type from DQPSK to DBPSK I get all of the packet. All seems to be roses now. Thanks. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
