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Re: [Discuss-gnuradio] parallel data reception
From: |
kaleem ahmad |
Subject: |
Re: [Discuss-gnuradio] parallel data reception |
Date: |
Wed, 17 Jun 2009 02:11:03 -0700 (PDT) |
usrp_dual_source want antennas which should be used as input parameters, as
follows (I copied this line from a question posted on a thread which was
using LFRX daughter cards)
self.usrp_dual_source_x_0 = grc_usrp.dual_source_c(which=0, side_a='A',
rx_ant_a='RXA', side_b='A', rx_ant_b='RXB')
But I am using RFX2400 daughter cards, which have antennas, RX2, RX/TX, and
I want to use only RX2 for both daughter cards (I have 2 RFX2400 daughter
cards installed with USRP1), please tell me which of the following should I
use:
1- self.usrp_dual_source_x_0 = grc_usrp.dual_source_c(which=0, side_a='RX2',
rx_ant_a='RX/TX', side_b='RX2', rx_ant_b='RX/TX')
2- self.usrp_dual_source_x_0 = grc_usrp.dual_source_c(which=0, side_a='RX2',
side_b='RX2')
If 1 is correct then how can I set RX2 antennas after that.
Best Regards
Josh Blum-2 wrote:
>
> There is a handy dual_usrp wrapper in grc:
> http://gnuradio.org/trac/browser/gnuradio/trunk/grc/src/grc_gnuradio/usrp/dual_usrp.py
>
> You can use it like:
> from grc_gnuradio import usrp as grc_usrp
> grc_usrp.dual_source_c(......)
>
> Or use the code as an example
>
> -Josh
>
> kaleem ahmad wrote:
>> Hallo,
>>
>> We use following when there is only one RFX2400 daughter card (I think
>> there
>> is onle one subdev in RFX2400 card....Is it correct???).
>>
>> u = usrp_source(....)
>>
>> u.set_mux(usrp.determine_rx_mux_value(u, rx_subdev_spec))
>>
>>
>> Can some one guide me how do I change it when two RFX2400 daughtercards
>> are
>> used.
>>
>> And what additional processing needs to be done to separate data streams
>> from RX2 antennas of both
>> cards.
>>
>> Best Regards
>>
>>
>>
>>
>> Jason Uher wrote:
>>>> I am using USRP1 + RFX2400.
>>>>
>>>> You know there are two antenna ports on RFX2400 daughter card those are
>>>> RX2,
>>>> TX/RX. Is it possible to use both these ports in parallel for data
>>>> reception. If yes then pelase provide me little clue how I should do
>>>> it,
>>>> or
>>>> may be refer me to some existing example.
>>>>
>>>> I have two RFX2400 daughter cards and my problem is to use two
>>>> different
>>>> ports for data reception, it doesnt matter if I use two ports on a
>>>> single
>>>> card (i.e RX2, and RX/TX), or two ports on two different cards (e.g.
>>>> RX2
>>>> on
>>>> each card). Please let me know which one is possible and easier to
>>>> implement
>>>> and please also refer me to some application where I can find relevant
>>>> code.
>>>>
>>> I do not believe it is possible to receive data from the TX/RX and TX
>>> port simultaneously, I believe the are tied to the same set of ADCs.
>>> You should use two RFX cards if you are planning on doing MIMO
>>> reception. Check in the examples section, I don't think there is a
>>> specific 2 antenna receive example with the 2400's; but there is a 4rx
>>> fm receiver that you should be able to extrapolate from.
>>>
>>> Jason
>>>
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>
>
>
> _______________________________________________
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> address@hidden
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>
>
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