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
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.
Yes, you can do it this way if you like.
what is advantages(if any) and disadvantages of this
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
What about when you want to implement in DSP or FPGA? What is advantages and disadvantages?
Regards
VLV
ma wrote:
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