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I am following this github example for understanding OFDM on gnuradio-companion, I am able to execute ofdm_tx individually (64 and 512 FFT point) without any issues, but when I connect these two in single graph, I am able to get spectrum from ofdm_tx (no output from ofdm_rx or getting straight line).

My question here, each time I close my output spectrum, my tool get hanged and in background (inside gnu-companion) I observe the following message tarin (attached, printscreen). Similar thing also observed when I run ofdm_rx individually.

Error message in Console :

packet_headerparser_b :info: Detected an invalid packet at item 1448. header_payload_demux :info :parser returned #f

Please guide me in this regard,

OFDM TX RX Graph

user3743908
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  • Please [edit] to add a transcription of your first image of text into actual text. [See here](https://meta.stackoverflow.com/a/285557/11107541) for why. – starball Jan 05 '23 at 07:23

1 Answers1

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by selecting "NO" for vector source "Repeat" variable , issue sorted out (no hang), but not able to see spectrum anymore.

user3743908
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