[opendtv] Re: Freedom from 8VSB

Ron Economos wrote:
 
> Bob Miller will enjoy this.
 
http://broadcastengineering.com/RF/new-advocacy-group-freedom-8vsb-modulation-dtv-broadcasters-1104/
 
Depends what they mean by efficiency.
 
Of course things can be improved now, to get better efficiency. If *spectral* 
efficiency is the main goal, then LTE is certainly not the answer. The ultimate 
in spectral efficiency is achieved with the best possible error correction, 
best possible equalizers, and with single carrier schemes. And with the FCC 
yanking even more frequencies away, you also have to consider reducing the 
distance between transmitters on a given channel, which means the lowest 
possible peak to average ratio.
 
I just posted a comparison of the various spectral efficiency figures for 2G 
through 4G TDMA, CDMA, and LTE.
 
If  spectral efficiency is not the prime concern, if single carrier schemes are 
deemed a non-starter because they aren't robust enough for terrestrial service, 
then we could agree to compromise some of the spectral efficiency, and some of 
the PAPR, trading it off for easier reception.
 
It is not very difficult to explain that these are all tradeoffs. I don't think 
it's difficult to understand that spectral efficiency should be a prime 
consideration too. I don't think these advocacy groups should assume people are 
too stupid to get it.
 
Bert
                                           
 
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