Hello, PLL is a good way to do FM demodulation in analogue domain. What about its use in digital domain? Why not to use a digital PLL to do FM demodulation? what is advantages(if any) and disadvantages of this technique? Regards
Digital PLL and FM demodulation
Started by ●November 28, 2006
Reply by ●November 28, 20062006-11-28
ma wrote:> Hello, > PLL is a good way to do FM demodulation in analogue domain. What about > its use in digital domain? Why not to use a digital PLL to do FM > demodulation? what is advantages(if any) and disadvantages of this > technique? > > Regards > >A disadvantage of the PLL technique is that it trickier to get it right compared to a discriminator. An advantage is that the threshold (knee in the SNRout vs SNRin curve) can be lower than for a discriminator. Search for the term "threshold extension" to get some ideas. John
Reply by ●November 28, 20062006-11-28
ma wrote:> Hello, > PLL is a good way to do FM demodulation in analogue domain. What about > its use in digital domain?There are many ways to do FM demodulation in analog or digital domains. Neither way is good or bad. It depends on what is available and what are the performance requirements.> Why not to use a digital PLL to do FM > demodulation?Yes, you can do it this way if you like. what is advantages(if any) and disadvantages of this> technique?It can provide for somewhat better performance compared to a discriminator. On the other side, the complexity will be significantly higher. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
Reply by ●November 28, 20062006-11-28
What about when you want to implement in DSP or FPGA? What is advantages and disadvantages? Regards "Vladimir Vassilevsky" <antispam_bogus@hotmail.com> wrote in message news:RGYah.10474$yE6.262@newssvr14.news.prodigy.com...> > > ma wrote: > >> Hello, >> PLL is a good way to do FM demodulation in analogue domain. What about >> its use in digital domain? > > There are many ways to do FM demodulation in analog or digital domains. > Neither way is good or bad. It depends on what is available and what are > the performance requirements. > >> Why not to use a digital PLL to do FM demodulation? > > Yes, you can do it this way if you like. > > what is advantages(if any) and disadvantages of this >> technique? > > It can provide for somewhat better performance compared to a > discriminator. On the other side, the complexity will be significantly > higher. > > Vladimir Vassilevsky > > DSP and Mixed Signal Design Consultant > > http://www.abvolt.com
Reply by ●November 28, 20062006-11-28
1. It depends. 2. Do your homework yourself. 3. Top posting is very rude. VLV ma wrote:> What about when you want to implement in DSP or FPGA? What is advantages and > disadvantages? > > Regards>>>PLL is a good way to do FM demodulation in analogue domain. What about >>>its use in digital domain? >> >>There are many ways to do FM demodulation in analog or digital domains. >>Neither way is good or bad. It depends on what is available and what are >>the performance requirements. >> >> >>>Why not to use a digital PLL to do FM demodulation? >> >>Yes, you can do it this way if you like. >> >>what is advantages(if any) and disadvantages of this >> >>>technique? >> >>It can provide for somewhat better performance compared to a >>discriminator. On the other side, the complexity will be significantly >>higher. >>