Re: [Discuss-gnuradio] Packet transmission questions from a newb

[Heaney, Eamon]

The final aim is to build a transmitter and receiver for 802.11p DSRC packets.

The receiver is currently using 802.11a, for testing purposes, but I do have a flowchart they successfully receives 802.11p instead.

I've figured out what I need to put in the file source (message binary, not .pcap), but I'm unsure how to translate that from a gr_stream to a gr_message, so I can feed it into the Wifi MAC block.

Thanks!

On Mon, Oct 28, 2019, 5:12 AM sumit kumar <address@hidden> wrote:

" but my wi-fi packet receiver works just dandy without any OFDM blocks" --> Can you check the standard which your wifi receiver is following ? If it is 802.11b, then it wont work with gr-ieee 80211 because gr-ieee 80211 is based on OFDM based WiFi. 

You cannot use .pcap file as file source for the wifi_tx.grc. 

May I know your final aim for this experiment so that I can put my suggestions ? 

Regards

Sumit 

On Sun, 27 Oct 2019 at 20:10, Eamon Heaney <address@hidden> wrote:

Hi,

I'm trying to create a wi-fi transmitter in GNURadio that can take a file source and transmit it as an 802.11 packet. I'm using this example as a basis, and trying to follow the guides here.

Frankly, though, a lot of what's in that guide goes way over my head. I have a general understanding of what OFDM is, but my wi-fi packet receiver works just dandy without any OFDM blocks. So is it still necessary to incorporate such blocks into a transmitter?

Secondly, I can't just plug a .pcap file source into the transmitter; it doesn't generate, and I get the feeling that .pcap isn't the proper format for transmission anyways. How can I figure out which blocks to put after the file source to make it gel with the next block in the example (WiFi MAC)?

Thanks!

--

Eamon Heaney

Fleet Commander

President, Model UN at Virginia Tech

--

Sumit Kumar

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