Re: [Discuss-gnuradio] USRP2 UHD Matlab Receiver Communications Blockset

[Vincent W]

On 09/10/2010 12:55 AM, Josh Blum wrote:
> 
> 
> On 09/09/2010 06:43 PM, Vincent W wrote:
>> Hi,
>>
>> I stumbled on this blockset on the Matlab website:
>>
>> http://www.mathworks.com/help/toolbox/commblks/ref/usrp2receiver.html
>>
>> I've been making do with the old firmware and fpga, but when I saw this 
>> link, I
>> became really excited - especially because it implies I can decrease the
>> decimation on my USRP2 to 1 - perhaps by requesting real, single precision
>> values instead of complex doubles.
>>
> 
> The minimum sustainable sample rate over the wire is 25Msps for the UHD 
> (unless
> you change FPGA implementation). I dont know what FPGA code "they" are using.
> Also, I dont think these simulink blocks have UHD under the hood.
> 
>> Is there an open source version of that blockset?
>>
>> Alternatively, despite poking around the UHD API, it wasn't immediately 
>> obvious
>> how I could change the type of data, or set a decimation of 1, from the
>> uhd::usrp::simple_usrp class. I suspect it may have something to do with the
>> uhd::io_type_t class, but, again, I'm not too sure.
>>
> 
> The device::send and device::recv calls take the IO type as an argument. The
> samples are converted between IO type and over-the-wire type in the UHD
> implementation code.
> 
> -Josh

I stand corrected; it seems like they are using the udp drivers, as opposed to
the uhd drivers.

My bad.

vvv