Hi Glen, That was a bit fast for me! Could you expand on that a little?
For example do you mean: 64 QAM -> low freq audio carrier -> FM mod Thanks, David On 15/12/14 05:44, glen english wrote: > Is possible to exploit the FM noise triangle, and use higher QAM > densitites at lower frequencies (say 64QAM) and lower qam densities(say > QPSK) at higher frequencies. (have done). For audio FMed, it is > rather a waste (though simple) to use the same constellation density > over the wideband . For AM, not the case (constant noise density v freq) . > > 'other' qam densities enables the use also of various PAPR reduction > schemes like moving constellation points to reduce PAPR. > > Turn up the deviation and watch the SNR versus carrier #. > > glen VK1XX > > On 15/12/2014 3:13 AM, Steve wrote: >>> Here in my neck of the woods for me to play with this I would need to have >>> this fit into a 10khz Channel. >> No problem, just set your deviation to 1.1 to 1.5 kHz. >> >> ------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & more >> Get technology previously reserved for billion-dollar corporations, FREE >> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk >> _______________________________________________ >> Freetel-codec2 mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
