Read_Write.rarDescription: Read_Write.rar
|
| From: | David Halls |
| Subject: | Re: [Discuss-gnuradio] Scheduling a block even with no input items RE: Flow graph blocking when doing 2x1 transmission |
| Date: | Thu, 5 Jun 2014 09:44:00 +0000 |
From: xianda [mailto:address@hidden
Sent: 05 June 2014 09:50
To: David Halls
Subject: Re:Re: [Discuss-gnuradio] Scheduling a block even with no input items RE: Flow graph blocking when doing 2x1 transmission
Hi David:
Thank you in advance.
I want to ask a question about "Payload TD Tx 1 is derived from input codewords that are generated in MATLAB and stored in a file, then loaded into the flow graph." as you said.I want to ask how to gnerated a dat document which is in MATLAB.What command you use in MATLAB?
Thanks very much.
Best regards,
xianda
Hi Xianda,
Please find the zip file attached with files to read and write (to/from MATLAB) both complex, and byte types.
Syntax is
input = read_complex_binary(‘filename.dat’)
input = read_char_binary(‘filename.dat’)
write_complex_binary(data,’filename.dat’)
write_char_binary(data,’filename.dat’)
Regards,
David
At 2014-06-04 08:53:31, "David Halls" <address@hidden> wrote:
Hi Activecat,
I have disconnected the rest of the flow graph because it is extremely complex.
In the system I have a Source, a Relay (1 rx USRP, 1 tx USRP), a Destination. S ---> R_rx/R_tx --> D
The two transmitters that you see on that flow graph snippet I sent you are the the Source Tx and the Relay Tx.
Payload TD Tx 1 is derived from input codewords that are generated in MATLAB and stored in a file, then loaded into the flow graph. The payload is created in a similar fashion to Martin's original OFDM_tx. This is then transmitted from Source Tx.
Until this point, no packets are received by Relay Rx but once the source transmits, these packets are then received by Relay Rx, and then there is a decode-and-forward chain of blocks, and this then creates Payload TD Tx 2.
The full flow graph is attached, but may be missing many blocks for you...
David
________________________________________
From: Activecat [address@hidden]
Sent: 04 June 2014 13:45
To: address@hidden
Cc: David Halls
Subject: Re: [Discuss-gnuradio] Scheduling a block even with no input items RE: Flow graph blocking when doing 2x1 transmission
On Wed, Jun 4, 2014 at 7:10 PM, David Halls <address@hidden<mailto:address@hidden>> wrote:
Activecat,
In fact my horrible hack doesn't work properly. Once items start arriving at Payload TD Tx 2, they still don't arrive as 'consistently' (for want of a better word), as those from the Noise Source block, and thus zeros are inserted when they are not required!
David
David,
Could you please explain in details, what is this Payload TD Tx 2?
How does it generate data, is it getting data from a hardware or console, why it sometime idle but sometime transmitting?
This is a virtual source. Where is it associated virtual sink?
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Read_Write.rar
Description: Read_Write.rar
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