Re: [Discuss-gnuradio] I&Q on same or separate channels?

[Dan Halperin]

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I suspect this comment:

http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/usrp/fpga/inband_lib/rx_buffer_inband.v#L120
"TODO write this genericly"

is where the interleaving should be done... maybe :).

- -Dan

George Nychis wrote:
> 
>>
>> I and Q are not on separate channels.  They are interleaved, I0, Q0,
>> I1, Q1...
>>
> 
> Are we sure of this?  Based on Brian's pointer to here:
> http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/usrp/fpga/toplevel/usrp_inband_usb/usrp_inband_usb.v#L235
> 
> 
> ... it seems as though they are wired to separate channels.  We then use
> them as inputs to rx_buffer_input here:
> http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/usrp/fpga/toplevel/usrp_inband_usb/usrp_inband_usb.v#L260
> 
> 
> ... but only ever read from channel 0 (I).
> 
> Is there a module we are missing that interleaves them?
> 
> - George
> 
> 
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