Tim Wescott wrote:> On 10/22/2010 10:40 AM, Vladimir Vassilevsky wrote: > >> >> >> Tim Wescott wrote: >> >>> On 10/22/2010 09:38 AM, Vladimir Vassilevsky wrote: >> >> >>> > FM at 4.8kHz ? A 8 bit microcontroller would do. >> >> >>> Good point -- I should have _thought_ about what the frequency >>> implied. And if an 8-bit micro will do, then one can easily do this >>> with floating point in a DSP. >> >> >> No. A 8-bit microcontroller would do in the floating point. > > > I didn't say it wouldn't, although it'd have to be a new one: > shoe-horning it into the 0.5MIPS machines that were available when I > graduated would be a challenge.When you graduated, you accomplished what you needed with that 0.5 MIPS 6811 thing that you had. Nobody thought it could be possible. Nowadays a moron with dual core Pentium don't have enough brains to do some basic processing at 4.8kHz.> Trying to do the job using the FFT, as the OP proposed, may bring it out > of the 8-bit class and firmly into DSP territory, however.That could be 8-bit deal also as it doesn't have to chase the real time.> The OP's post has "senior project" written all over it, in which case > one of his customer (i.e. advisor) requirements could well be "use this > here eval board".There is a paradox which I can't understand: despite of the miracles of Google and Wikipedia, and public libraries with so many good books, why there are so many clueless folks around? VLV
FM Demodulation to extract Doppler Shift
Started by ●October 22, 2010
Reply by ●October 23, 20102010-10-23
Reply by ●October 23, 20102010-10-23
On 10/22/2010 08:12 PM, Vladimir Vassilevsky wrote:> > > Tim Wescott wrote: > >> On 10/22/2010 10:40 AM, Vladimir Vassilevsky wrote: >> >>> >>> >>> Tim Wescott wrote: >>> >>>> On 10/22/2010 09:38 AM, Vladimir Vassilevsky wrote: >>> >>> >>>> > FM at 4.8kHz ? A 8 bit microcontroller would do. >>> >>> >>>> Good point -- I should have _thought_ about what the frequency >>>> implied. And if an 8-bit micro will do, then one can easily do this >>>> with floating point in a DSP. >>> >>> >>> No. A 8-bit microcontroller would do in the floating point. >> >> >> I didn't say it wouldn't, although it'd have to be a new one: >> shoe-horning it into the 0.5MIPS machines that were available when I >> graduated would be a challenge. > > When you graduated, you accomplished what you needed with that 0.5 MIPS > 6811 thing that you had. Nobody thought it could be possible. > Nowadays a moron with dual core Pentium don't have enough brains to do > some basic processing at 4.8kHz. > >> Trying to do the job using the FFT, as the OP proposed, may bring it >> out of the 8-bit class and firmly into DSP territory, however. > > That could be 8-bit deal also as it doesn't have to chase the real time. > >> The OP's post has "senior project" written all over it, in which case >> one of his customer (i.e. advisor) requirements could well be "use >> this here eval board". > > There is a paradox which I can't understand: despite of the miracles of > Google and Wikipedia, and public libraries with so many good books, why > there are so many clueless folks around?I remember being markedly clueless when I was young, and often when I venture into areas that I've never been, or haven't been for a while, I find that I'm still clueless (or at least suffering from hypoclueness). You're only 100% competent if you're not pushing yourself. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" was written for you. See details at http://www.wescottdesign.com/actfes/actfes.html
Reply by ●October 23, 20102010-10-23
Tim Wescott <tim@seemywebsite.com> writes:> [...] > You're only 100% competent if you're not pushing yourself.On that we can agree on! Confidence is a sign of lingering too long in your comfort zone. -- Randy Yates % "Rollin' and riding and slippin' and Digital Signal Labs % sliding, it's magic." mailto://yates@ieee.org % http://www.digitalsignallabs.com % 'Living' Thing', *A New World Record*, ELO
Reply by ●October 23, 20102010-10-23
Randy Yates wrote:> Tim Wescott <tim@seemywebsite.com> writes: > >>[...] >>You're only 100% competent if you're not pushing yourself. > > > On that we can agree on! Confidence is a sign of lingering too > long in your comfort zone.//-------- "A man goes to knowledge as he goes to war: wide-awake, with fear, with respect, and with absolute assurance. Going to knowledge or going to war in any other manner is a mistake, and whoever makes it might never live to regret it." Carlos Castaneda //-------- VLV
Reply by ●October 27, 20102010-10-27
On Fri, 22 Oct 2010 22:12:13 -0500, Vladimir Vassilevsky
<nospam@nowhere.com> wrote:
[Snipped by Lyons]
>
>There is a paradox which I can't understand: despite of the miracles of
>Google and Wikipedia, and public libraries with so many good books, why
>there are so many clueless folks around?
>
>VLV
Hi Vladimir,
IF DSP were easy, they'd call it a sport.
See Ya',
[-Rick-]
