[Discuss-gnuradio] CC Decoder with punctured code = errors

Hi everyone, Is it possible to modify the *traceback depth* of the built-in *CC Decoder Definition*? It appears unable to recover errors I have introduced during puncturing/depuncturing, returning values with bit errors still present. I am trying to decode a PDU I originally convolutionally encod

[Discuss-gnuradio] 64QAM Repack Bits Misalignment

Hi everyone, I am using the *Repack Bits *block to unpack bytes into 6 bits (aka. k=8 to l=6) and then repack this output back into full bytes (aka. k=6 to l=8). The input is a stream of tagged packets, say of length 5 bytes (6.667 64QAM symbols), meaning the number of bits isn't exactly divisible

Re: [Discuss-gnuradio] OFDM Channel Equalisation not unity for perfect channel

thing I'm misinterpreting about the Schmidl & Cox method's triggering or is this a known issue? Thanks for your help. Regards, Justin On Mon, May 8, 2017 at 1:01 PM, Justin Hamilton wrote: > Hi everyone, > > I've been working on a coded-OFDM system (looks similar to the stan

[Discuss-gnuradio] OFDM Channel Equalisation not unity for perfect channel

Hi everyone, I've been working on a coded-OFDM system (looks similar to the standard OFDM flowgraphs) and have come to the stage where I am trying to improve channel estimation by implementing LS, STA and comb pilot interpolation methods similar to gr-ieee802.11. If I follow the default technique

Re: [Discuss-gnuradio] uhd_packet_rx example freezes - Header/Payload Demux not releasing payload

te > accordingly, adapt the FLL to that to still lock tightly onto you signal, > and make sure the sps in the packet_rx reflects the new sps value. > > Best regards, > Marcus > > On 03/28/2017 04:58 AM, Justin Hamilton wrote: > > Hi everyone, > > I'm trying to

Re: [Discuss-gnuradio] Derive OOT header format from header_format_default

*gr-cognitiveSDR/lib/header_format_cognitive.h*" (not pure virtual ie. "*bool setter_function() = 0*" as this prevents me from even instantiating the object ), and defined in the source " *gr-cognitiveSDR/lib/header_format_cognitive.cc*". Any ideas? Do I need to add somethi

[Discuss-gnuradio] Derive OOT header format from header_format_default

Hi everyone, I'm creating a custom header format *'header_format_cognitive*' derived from *'header_format_default*'. I'm adding extra info to the default header, very similar to the way the child class *'header_format_counter*' adds bits/symbol to the default. I'm creating my class as an OOT modul

[Discuss-gnuradio] uhd_packet_rx example freezes - Header/Payload Demux not releasing payload

Hi everyone, I'm trying to develop a packet-based, single-carrier system (BPSK, QPSK, QAM) with FEC (CC) similar to that implemented in packet_rx.grc and packet_tx.grc. I am using two Ettus B205mini-i as my USRP devices, connected for now, via a 50Ω, 30dB attenuator and SMA cable (antennas also at