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klemens said:comment on the advantages and disadvantages of DSB-SC modulation compared with AM
comment on the advantages and disadvantages of DSB-SC modulation compared with AM
DSB-SC is a subset of AM techniques, I think you mean to compare DSB-SC with DSB-LC; the DSB-SC has less power consumption with no redundant carrier added to the signal, the circuits used to generate both will certainly differ.
For instance, did you hear of a simple AM demodulator that can be used for any modulation index; from zero (carrier only) to infinity (carrier suppressed)?
The one I designed (as an MS thesis), built and implemented in some of my private links (in the 80's) is based on a conventional PLL with a minor modification (no coils, no selective filters or amplitude tracker). I am surprised how after decades no one in the world had the chance to also find its concept as I did!!! Even FCC group has no idea for example that a simple and low cost DSB-SC detector does exist and can be built even by a radio amateur and be as reliable as the ones based on the complex Costas Loop technique implemented in relatively costly digital ICs.
Kerim
Hi Kerim,
Could you tell us more about your demod ? I did one demod for DSB-SC recently that divides by the carrier and requires no filtering, but as you say, PLL is the source of complexity in DSBSC.
Thanks and Good bless Syria
I am a fresh graduate I'm not an Analog comm. expert but as far as I know, the PLL and filters are the source of complexity in DSBSC, I was asking about the new thing in your demod.?