Hi All, I'm looking at FSK modulation in practical multi-path channels. What type of equalizers are suitable for FSK ? What type of equalizers are appropriate for other non-coherent modulation schemes ? Highly appreciate if you could provide any relevant paper or a book. Thanks in advance. Dan _____________________________ Posted through www.DSPRelated.com
Equalizers for FSK systems
Started by ●July 7, 2014
Reply by ●July 7, 20142014-07-07
On Monday, July 7, 2014 2:12:33 AM UTC-4, Dan25 wrote:> Hi All, > > > > I'm looking at FSK modulation in practical multi-path channels. What type > > of equalizers are suitable for FSK ? What type of equalizers are > > appropriate for other non-coherent modulation schemes ? > > > > Highly appreciate if you could provide any relevant paper or a book. > > > > Thanks in advance. > > Dan > > > > _____________________________ > > Posted through www.DSPRelated.comLook up "Constant Modulus Algorithm".
Reply by ●July 7, 20142014-07-07
On Mon, 07 Jul 2014 01:12:33 -0500, "Dan25" <98432@dsprelated> wrote:>Hi All, > >I'm looking at FSK modulation in practical multi-path channels. What type >of equalizers are suitable for FSK ? What type of equalizers are >appropriate for other non-coherent modulation schemes ? > >Highly appreciate if you could provide any relevant paper or a book. > >Thanks in advance. >DanConstant Modulus Algorithm (CMA) or, for non-coherent PSK, something sneaky like this if you need more performance: http://www.anchorhill.com/site/index.php?/site/section_products/mobile_phase_recovering_equalizer/ Eric Jacobsen Anchor Hill Communications http://www.anchorhill.com
Reply by ●July 7, 20142014-07-07
On Monday, July 7, 2014 11:40:20 AM UTC-4, Eric Jacobsen wrote:> On Mon, 07 Jul 2014 01:12:33 -0500, "Dan25" <98432@dsprelated> wrote: > > > > >Hi All, > > > > > >I'm looking at FSK modulation in practical multi-path channels. What type > > >of equalizers are suitable for FSK ? What type of equalizers are > > >appropriate for other non-coherent modulation schemes ? > > > > > >Highly appreciate if you could provide any relevant paper or a book. > > > > > >Thanks in advance. > > >Dan > > > > Constant Modulus Algorithm (CMA) or, for non-coherent PSK, something > > sneaky like this if you need more performance: > > > > http://www.anchorhill.com/site/index.php?/site/section_products/mobile_phase_recovering_equalizer/ > > > > > > Eric Jacobsen > > Anchor Hill Communications > > http://www.anchorhill.comThat looks pretty cool. I was wondering how it compares to or can benefit from a multisymbol differential detector for MPSK as in Divsalar and Simon, 1990.
Reply by ●July 7, 20142014-07-07
On Mon, 7 Jul 2014 16:57:55 -0700 (PDT), John <sampson164@gmail.com> wrote:>On Monday, July 7, 2014 11:40:20 AM UTC-4, Eric Jacobsen wrote: >> On Mon, 07 Jul 2014 01:12:33 -0500, "Dan25" <98432@dsprelated> wrote: >> >> >> >> >Hi All, >> >> > >> >> >I'm looking at FSK modulation in practical multi-path channels. What type >> >> >of equalizers are suitable for FSK ? What type of equalizers are >> >> >appropriate for other non-coherent modulation schemes ? >> >> > >> >> >Highly appreciate if you could provide any relevant paper or a book. >> >> > >> >> >Thanks in advance. >> >> >Dan >> >> >> >> Constant Modulus Algorithm (CMA) or, for non-coherent PSK, something >> >> sneaky like this if you need more performance: >> >> >> >> http://www.anchorhill.com/site/index.php?/site/section_products/mobile_phase_recovering_equalizer/ >> >> >> >> >> >> Eric Jacobsen >> >> Anchor Hill Communications >> >> http://www.anchorhill.com > >That looks pretty cool. I was wondering how it compares to or can benefit from a multisymbol differential detector for MPSK as in Divsalar and Simon, 1990.Short answer: I don't know. Since the existing system operates only a couple of tenths of a dB from coherent reception of differentially encoded PSK, one would think performance might suffer, or at least that any gain would be very small. I think that's why most people use VV (Viterbi-Viterbi) instead of D&S, but it's been forever since I looked at D&S in any detail. Eric Jacobsen Anchor Hill Communications http://www.anchorhill.com
