Hi Wan, Set your sine wave amplitude to a value less than 1, since the input to PFB should come from ADC which is FIX_8_7 I always set the amplitude to 0.4 for my simulation, never had a problem.
Zhiwei On Tue, Jan 12, 2010 at 10:37 PM, Dan Werthimer <[email protected]>wrote: > > > hi wan, > > what are the levels of this output? > if they are the least significant bits, > then this is likely from round off noise. > > best wishes, > > dan > > > > On 1/12/2010 6:45 PM, [email protected] wrote: > > > Hi All: > > I use a matlab sine wave generator to generate a sine wave as an input to > PFB and FFT. > > But I find I get a little DC output and a few small steps from FFT output. > I am pretty sure there is no DC added into the input signal. So where these > DC could be from? > > And why there is some small steps on the noise floor? > > For the details of spectrum output, please see the attached. > > Thanks > > Wan > > > -- Zhiwei Liu
