Re: [Discuss-gnuradio] tx_ofdm.grc & rx_ofdm.grc output data

[ashish mishra]

Hi

 Change the payload modulation to BPSK(Same as BPSK) and keep the bytes repack as 1 to 8 .

It will do the trick

On Thursday, 24 October 2013 11:44 PM, eontool <address@hidden> wrote:

Hi Martin.

I used the default settings for the parameters.

The data I'm seeing is after de CRC.

Here's my payload output at the HPD:
----------------------------------------------------------------------
Tag Debug: HPD / Payload
Input Stream: 00
  Offset: 1547  Source: n/a    Key: frame_len  Value: 17
  Offset: 1547  Source: n/a    Key: packet_num  Value: 182
  Offset: 1547  Source: n/a    Key: packet_len  Value: 800
  Offset: 1547  Source: n/a    Key: ofdm_sync_carr_offset  Value: 0
  Offset: 1547  Source: n/a    Key: ofdm_sync_chan_taps  Value:
#<uniform-vector>
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
  Offset: 1555  Source: n/a    Key: packet_len  Value: 960
----------------------------------------------------------------------

My vector source argument is:
tagged_streams.make_lengthtags((packet_len,), (0,), length_tag_name)


Other stuff:

I changed the OFDM Frame Equalizer of the payload part:
From:
digital.ofdm_equalizer_simpledfe(fft_len, *header*_mod.base(),
occupied_carriers, pilot_carriers, pilot_symbols, 2).base()

To:
digital.ofdm_equalizer_simpledfe(fft_len, *payload*_mod.base(),
occupied_carriers, pilot_carriers, pilot_symbols, 2).base()

I added a Repack Bits block at the rx, just before the CRC, from 2 to 8
bits.

I uploaded a screenshot and the grc file  here
<https://drive.google.com/folderview?id=0B0wrUyWcKcmNUUtaSTlnMkpPdUE&usp=sharing>
:

Any help is really appreciated, thanks!



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