Re: [Discuss-gnuradio] About setting the GRC block properties.

Thanks for reply,

Because in this site, http://gnuradio.org/doc/doxygen/page_ofdm.html

The figure in transmitting part, http://gnuradio.org/doc/doxygen/ofdm_tx_core.png

"Virtual source" block shows "pre-ofdm", which means I need to create some blocks like "Virtual sink" labeled "pre-ofdm" before this?

if yes, I am thinking to create the blocks like

"Random Source -> OFDM Mod -> Virtual sink"

I am not sure if

"OFDM carrier allocator, FFT, and OFDM cyclic prefixer" are doing the same thing with "OFDM Mod"

Or should I change the

"OFDM Mod" block into like "PSK Mod"?

And about the error,

You were saying

"I think you just need brackets around the carrier allocation table.

Also, use Python's range() to make stuff more readable."

Can you explain it more specifically?

bracket at which section?

"python's range()" I have no idea what this is?

Thanks

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Using Volk machine: sse4_1_64_orc

Traceback (most recent call last):

File "/home/TX-test/top_block.py", line 106, in <module>

tb = top_block()

File "/home/TX-test/top_block.py", line 59, in __init__

self.digital_ofdm_carrier_allocator_cvc_1 = digital.ofdm_carrier_allocator_cvc(fft_len, (-30,-29,-28, -27, -26, -25, -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8 , -7, -6, -5, -4, -3, -2, -1,1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,22,23,24,25,26,27,28,29, 30,31),(-30,-29,-28, -27, -26, -25, -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8 , -7, -6, -5, -4, -3, -2, -1,1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,22,23,24,25,26,27,28,29, 30,31), ((-31),(-31)), ((1),(1j)), (0,0), "packet_len")

File "/usr/local/lib/python2.7/dist-packages/gnuradio/digital/digital_swig.py", line 4268, in make

return _digital_swig.ofdm_carrier_allocator_cvc_make(*args, **kwargs)

TypeError: in method 'ofdm_carrier_allocator_cvc_make', argument 2 of type 'std::vector< std::vector< int,std::allocator< int > >,std::allocator< std::vector< int,std::allocator< int > > > > const &'

On Thu, Sep 19, 2013 at 12:21 AM, Martin Braun (CEL) <address@hidden> wrote:

On Tue, Sep 17, 2013 at 02:50:33PM -0500, Kevin wrote:
> self.digital_ofdm_carrier_allocator_cvc_1 =
> digital.ofdm_carrier_allocator_cvc(fft_len, (-30,-29,-28, -27, -26, -25, -24,
> -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8 ,
> -7, -6, -5, -4, -3, -2, -1,1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
> 16, 17, 18, 19, 20, 21,22,23,24,25,26,27,28,29, 30,31),(-30,-29,-28, -27, -26,
> -25, -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10,
> -9, -8 , -7, -6, -5, -4, -3, -2, -1,1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
> 14, 15, 16, 17, 18, 19, 20, 21,22,23,24,25,26,27,28,29, 30,31), ((-31),(-31)),
> ((1),(1j)), (0,0), "packet_len")

I think you just need brackets around the carrier allocation table.
Also, use Python's range() to make stuff more readable.

> File "/usr/local/lib/python2.7/dist-packages/gnuradio/digital/

> digital_swig.py", line 4268, in make
>
> return _digital_swig.ofdm_carrier_allocator_cvc_make(*args, **kwargs)
>
> TypeError: in method 'ofdm_carrier_allocator_cvc_make', argument 2 of type
> 'std::vector< std::vector< int,std::allocator< int > >,std::allocator<
> std::vector< int,std::allocator< int > > > > const &'
>

> I think I set something wrong on this block, is there any place which contain
> all the documentation about how to set the parameters?

Yeah, of course: http://gnuradio.org/doc/doxygen/group__ofdm__blk.html
It's in the manual.

> also, I am confused on the "Virtual source" block, it shows "pre-ofdm"
>
> how can I create and make this?

This is unclear. Perhaps you can explain what you're trying to do?

MB

--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstraße 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu

KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

From:	Kevin
Subject:	Re: [Discuss-gnuradio] About setting the GRC block properties.
Date:	Fri, 20 Sep 2013 13:45:46 -0500