Re: [Discuss-gnuradio] parallel data reception

[kaleem ahmad]

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
> 
> 
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