### Patrick Le Roux (@precesseur)

Aeronautical Engineer, PhD in Physics Orsay France. Retired (GE Healthcare). Specialized in Magnetic Resonance Imaging, physics and signal analysis. Several publications and patents, inventor of the 'Shinnar-Le Roux' algorithm for designing selective RF pulses in magnetic resonance (or in optics). plenag.free.fr

## Re: Coherent re-sampling

If you are sure (or somewhat sure) of the frequency of  the perturbating signal you can, before doing the FFT, translate in frequency by premutiplying by a compex...

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## Re: FFT Interpolation

Well there is nothing wrong with your reasoning. You maybe just forget that, as anybody else, you  cannot invent data that you do not know. In this sense the linear...

## Re: Real to Complex conversion

Your specs are not precise enough, but supposing that your signal of interest is relatively low bandwidth around a carrier of 250Mhz  (say bandwidth < 25 Mhz)...

## Re: Sign of the magnitude difference

Well to be sure let me recall your definition: "|z1- z2|  (2)  First difference (I1-I2 , Q1-Q2) and then mag. "  The "then mag" is important, if the difference...

## Re: Sign of the magnitude difference

I do not understand: the phase  of (2) is always 0.  If the given is strictly |z1-z2| , then forget it you will never be able to find out which of z1 or z2 has...

## Re: Possible Bug - Need your Help

...and  being totally logouted (and then closing everything), googled 'DSPRelated.com', not logined OK, could navigate and see 'blogs' and even read 'A Direct...

## Re: Possible Bug - Need your Help

I am logged in, going to blogs (i;e. https://www.dsprelated.com/blogs.php) I see a populated page with 'recent' for instance with 'A Direct Digital Synthesizer...

## Re: Is this time-domain aliasing?

I try to. But .. Maybe I am missing something: hitting "delete" on one of them (the last one say) does not avail to anything. Is it that I am doing that from France...

## Re: Is this time-domain aliasing?

I would say it is frequency domain aliasing linked to the fact that the number of balls is N= 15=3x5.  The strings (or mass of the balls) have been adapted so that...

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