[Discuss-gnuradio] (no subject)

[Robitaille, Michael]

 

On Monday, November 14, 2005 5:59 PM McGwier [mailto:address@hidden wrote:

 

> I am attempting to understand what advantage you would gain by reducing

> the sample rate.  The FPGA's only jobs are run an oscillator, mix, and

> resample using special form filters.  Now that the halfband filters are

> in,  you can reduce the sample rate and get a very nice response in so

> doing.  You could then proceed to operate on the downsampled signal in

> the computer.  I just don't under the system problem you are attempting

> to solve by changing the hardware in this case.  Could you elaborate?

 

 

 

Could you provide an example of how to use the halfband filters for downsampling?

 

 

PS: See my other response for an explanation on why change the sample rate.  I am not sure if performing decimation does the same effect for moving under sampled images in the FFT frequency response.

 

Thanks,

Mike