Re: [Discuss-gnuradio] UHD stream tagging

2014-02-08 Thread chris 0
Someone correct me if i'm wrong, but the PSK mod won't propagate stream tags. On Sat, Feb 8, 2014 at 8:25 PM, Marc Newlin wrote: > The burst tagging won't cause the USRP to stop transmitting -- it tells > the USRP not to expect any more samples, but any delay logic must be > implemented in you

Re: [Discuss-gnuradio] Using Header/Payload Demux

2014-01-27 Thread chris 0
Hi Martin, Thanks a lot for all your help! I just added the CRC checker, and it works perfectly! I'd never have been able to figure that out by myself. Kind Regards Chris On Mon, Jan 27, 2014 at 8:12 AM, Martin Braun wrote: > On 01/25/2014 09:30 PM, chris 0 wrote: > > Tag D

Re: [Discuss-gnuradio] Using Header/Payload Demux

2014-01-25 Thread chris 0
the first packet_len is still 14, rather than 112, which is confusing me. Thanks a lot. Chris On Mon, Jan 20, 2014 at 9:09 AM, Martin Braun wrote: > On 01/18/2014 09:46 PM, chris 0 wrote: > > Hi, > > > > I'm wondering if anyone can take a look at my grc file, which

[Discuss-gnuradio] Using Header/Payload Demux

2014-01-18 Thread chris 0
Hi, I'm wondering if anyone can take a look at my grc file, which uses the header/payload demux to try to obtain a payload - but I'm currently getting incorrect values from the tags. For instance packet_len should be 10, but the value is mostly 1. I've attached the file. If you can't open it f

Re: [Discuss-gnuradio] Connecting "PDU to tagged stream" to modulator

2014-01-13 Thread chris 0
Thanks Martin, The problem with connecting the tagged stream directly to the modulator, is then how do you align bits to the byte boundary etc. after the demodulator, which is the main issue I was thinking with that. cheers Chris ___ Discuss-gnuradio ma

[Discuss-gnuradio] Connecting "PDU to tagged stream" to modulator

2014-01-12 Thread chris 0
Hi, I'm trying to work out the best way to connect a "PDU to tagged stream" block to a modulator. I presume you can't simply attach the "PDU to tagged stream" directly to a modulator. So I was thinking of doing: Tun tap pdu -> PDU to tagged stream ---> packet encoder > modulator Howeve

[Discuss-gnuradio] How to get the output from constellation receiver to match modulators symbol rate

2013-12-04 Thread chris 0
Hi, I currently have the constellation modulator set @ 2 samples / symbol. The constellation receiver is giving me all the bits as output (it's not down-sampling the bits, if that's the correct word), so i'm getting duplicate bits, anyone got any idea how get the receiver to match the symbol rate

[Discuss-gnuradio] DPSK losing bytes in simulation

2013-12-03 Thread chris 0
Hi, I'm very confused with the following flow chart: file --> throttle --> dpsk mod ---> dpsk demod --> unpacked to packed --> file sink I'm losing 2 bytes in the output file. I've uploaded the grc here - www.anfractuosity.com/files/dpsk-test.grc I realise the data could get corrupted due to t