Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-22 Thread Luke Berndt
> Xlating FIRs just generate the sin internally and apply it themselves; they > are mathematically equivalent to shifting your signal and filtering it > afterwards. > You can, of course, use bandpasses, if you're after a specific sprectral > shape. Try the gr_filter_design toolbox, it's even ne

Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-22 Thread Johnathan Corgan
On Thu, Aug 22, 2013 at 3:24 AM, Marcus Müller wrote: > On 08/21/2013 08:15 PM, Luke B wrote: > > - What is the best approach performance wise for selecting multiple > ~15khz channels from a 2mhz+ source block? Is it using a Xlating FIR > Filter with a low-pass? Is it more efficient to use a S

Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-22 Thread Marcus Müller
On 08/21/2013 08:15 PM, Luke B wrote: - What is the best approach performance wise for selecting multiple ~15khz channels from a 2mhz+ source block? Is it using a Xlating FIR Filter with a low-pass? Is it more efficient to use a SIN Sig source & Multiply Block with a low-pass FIR Filter? Is t

Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-21 Thread Mike Jameson
Hi Vanush, It uses the gr-osmosdr GRC block and the Funcube Dongle Pro+ is second in the list of compatible devices so yes it will work: http://sdr.osmocom.org/trac/wiki/GrOsmoSDR However, In order to work using the 192KHz bandwidth of the Funcube Pro+ you will need to fiddle with the sample rat

Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-21 Thread Vanush Vaswani
Mike, does this work with the Funcube Dongle Pro+? On Thu, Aug 22, 2013 at 4:39 AM, Mike Jameson wrote: > Hi Luke, > > I've found using the FFT blocks are the most cpu efficient way to extract > a channel from the whole 20MHz of the HackRF. Have a look at my latest > Scanoo release built in

Re: [Discuss-gnuradio] Processing multiple signals off single source block

2013-08-21 Thread Mike Jameson
Hi Luke, I've found using the FFT blocks are the most cpu efficient way to extract a channel from the whole 20MHz of the HackRF. Have a look at my latest Scanoo release built in GRC which uses the 'Keep X in N' block to select the channel required. There's also a spectrum sense mode which locks

[Discuss-gnuradio] Processing multiple signals off single source block

2013-08-21 Thread Luke B
I am working on a processing multiple signals using a single source block. The background is below, but I had a couple of high level questions: - What is the best approach performance wise for selecting multiple ~15khz channels from a 2mhz+ source block? Is it using a Xlating FIR Filter with a lo