Hi I am interested in learning about IF sampling and its basics. any useful literature that you can point me to would be useful thank you
IF sampling- basics
Started by ●October 13, 2011
Reply by ●October 13, 20112011-10-13
On Thu, 13 Oct 2011 07:08:08 -0700, Kris Gurumoorthy wrote:> Hi > I am interested in learning about IF sampling and its basics. any useful > literature that you can point me to would be useful > > thank youWhat do you want to know? How to set sample rate? How to select an ADC? When and how to use an external sampler? Whatever other questions I left out? -- www.wescottdesign.com
Reply by ●October 13, 20112011-10-13
On Thu, 13 Oct 2011 09:46:44 -0500, Tim Wescott wrote:> On Thu, 13 Oct 2011 07:08:08 -0700, Kris Gurumoorthy wrote: > >> Hi >> I am interested in learning about IF sampling and its basics. any >> useful literature that you can point me to would be useful >> >> thank you > > What do you want to know? How to set sample rate? How to select an > ADC? When and how to use an external sampler? Whatever other questions > I left out?I neglected to mention: This article: http://www.wescottdesign.com/ articles/Sampling/sampling.pdf has a few paragraphs pertaining to IF sampling, mostly having to do with setting the sampling rate in a sub- sampled system. If you want to know about IF sampling in general, it leaves out a lot more than it puts in, but you may find it useful. -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
Reply by ●October 13, 20112011-10-13
On 10/13/2011 10:08 AM, Kris Gurumoorthy wrote:> Hi > I am interested in learning about IF sampling and its basics. any > useful literature that you can point me to would be usefulAt what point does your education need to start? Do you understand baseband sampling? Jerry -- Engineering is the art of making what you want from things you can get.
Reply by ●October 13, 20112011-10-13
On 13.10.2011 18:08, Kris Gurumoorthy wrote:> Hi > I am interested in learning about IF sampling and its basics. any > useful literature that you can point me to would be useful > > thank youA good starting point could be this chapter of Data Conversion Handbook: http://www.analog.com/library/analogDialogue/archives/39-06/Chapter%202%20Sampled%20Data%20Systems%20F.pdf see pages 31 to 34 -- Alexander
Reply by ●October 13, 20112011-10-13
Kris Gurumoorthy wrote:> Hi > I am interested in learning about IF sampling and its basics. any > useful literature that you can point me to would be useful > > thank you
Reply by ●October 13, 20112011-10-13
On Oct 13, 7:55�am, Jerry Avins <j...@ieee.org> wrote:> On 10/13/2011 10:08 AM, Kris Gurumoorthy wrote: > > > Hi > > I am interested in learning about IF sampling and its basics. any > > useful literature that you can point me to would be useful > > At what point does your education need to start? Do you understand > baseband sampling? > > Jerry > -- > Engineering is the art of making what you want from things you can get.Yes I understand Nyquist sampling well. I am interested in IF/bandpass sampling. What I want to know is how the sample rate is chosen for sample rate conversion when the band of interest is not baseband and its associated spectra in a practical system.
Reply by ●October 13, 20112011-10-13
On Thu, 13 Oct 2011 10:10:24 -0700, Kris Gurumoorthy wrote:> On Oct 13, 7:55 am, Jerry Avins <j...@ieee.org> wrote: >> On 10/13/2011 10:08 AM, Kris Gurumoorthy wrote: >> >> > Hi >> > I am interested in learning about IF sampling and its basics. any >> > useful literature that you can point me to would be useful >> >> At what point does your education need to start? Do you understand >> baseband sampling? >> >> Jerry >> -- >> Engineering is the art of making what you want from things you can get. > > Yes I understand Nyquist sampling well. I am interested in IF/bandpass > sampling. What I want to know is how the sample rate is chosen for > sample rate conversion when the band of interest is not baseband and its > associated spectra in a practical system.Then see the paper I cited -- it addresses that to some extent. -- www.wescottdesign.com
Reply by ●October 13, 20112011-10-13
the easy way to do this is to consider that all the harmonics of the sampling frequency are present and each one works just as well as the fundamental to downconvert and sample signals that are near them... (which is not exactly true but its a good start) Mark> > Yes I understand Nyquist sampling well. I am interested in IF/bandpass > > sampling. What I want to know is how the sample rate is chosen for > > sample rate conversion when the band of interest is not baseband and its > > associated spectra in a practical system. >
Reply by ●October 15, 20112011-10-15
On Thu, 13 Oct 2011 10:10:24 -0700 (PDT), Kris Gurumoorthy <krishk24@gmail.com> wrote:>On Oct 13, 7:55�am, Jerry Avins <j...@ieee.org> wrote: >> On 10/13/2011 10:08 AM, Kris Gurumoorthy wrote: >> >> > Hi >> > I am interested in learning about IF sampling and its basics. any >> > useful literature that you can point me to would be useful >> >> At what point does your education need to start? Do you understand >> baseband sampling? >> >> Jerry >> -- >> Engineering is the art of making what you want from things you can get. > >Yes I understand Nyquist sampling well. I am interested in IF/bandpass >sampling. What I want to know is how the sample rate is chosen for >sample rate conversion when the band of interest is not baseband and >its associated spectra in a practical system.Hello Kris, If your bandpass analog signal is centered at 'F' hertz, and has a bandwidth of 'B' hertz, then the bandpass sampling rate can be 'Fs' that satisfies the following: 2F - B 2F + B -------- > Fs > -------- m m + 1 Note: in the above expression the '>' symbol means "equal to or greater than." The variable 'm' is an integer and can be any positive integer just so long as Fs is greater than 2B. Good Luck, [-Rick-]
