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Re: [Discuss-gnuradio] How to simultaneously tx/rx on usrp with OFDM?

From: Mattias Kjellsson
Subject: Re: [Discuss-gnuradio] How to simultaneously tx/rx on usrp with OFDM?
Date: Tue, 11 Aug 2009 17:37:40 +0200
User-agent: Thunderbird (X11/20090608)

> There are several problems I am facing now(sorry, I am not a good programmer, 
> maybe they are silly questions):
> 1. I am trying to use different threads to receive packets and transmit 
> packets. Although I used "global killed" and "sys.exit(1)" to make sure 
> threads exit when Ctrl-C pressed, it won't abort to the command line. 
> 2. As I said I need to combine received packets and locally generated packets 
> at transmitting, but I didn't figure out how to achieve that. I am thinking 
> of 
> make a global variable payload_all[], and just throw every packets into it, 
> then use send_pkts to transmit the payload while receiving packets from 
> others 
> in another thread. Is that possible?
> 3. The blocks transmit_path and receive_path I think are both having only 1 
> connector in the graph. Is there any easy way to connect these two parts? Or 
> is there any other blocks that I can use to make this kind of connection?
> Any related suggestion will be appreciated.

Have you had a look at gr_message_sink/source? I think they might be a
good substitute to the global "payload_all[]".

Just my uninitialized and very quick thoughts...


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