Hi Greg
I did mention that I was only considering computing the PAPR, and then
if it exceeded some threshold, produce a new sequence... On the
likelihood you wont get another bad one. IE a gamble.
I'm interested that you are considering what can be done at the receiver
end to improve
On Mon, Jun 22, 2020 at 4:55 AM glen english wrote:
> One thing to consider- accurate PAPR measurement (by a receiver) is
> hard at low SNR.
That is one of the nice things about FEC based PAPR reduction, the
receiver doesn't need to measure PAPR yet it exploits the PAPR
reduction regardless.
Hi Greg
RRR
One thing to consider- accurate PAPR measurement (by a receiver) is
hard at low SNR.
Tone reservation is probably the lowest cost means for this setup. And
backward compatible.
Remapping as I described this morning is probabaly reasonable, also-
--given that LDPC encode is
On Sun, Jun 21, 2020 at 9:51 PM glen english wrote:
> I was giving some thought to how PAPR reduction might be implemented
> within the current framework, taking into account the limited capability
> of the SM1000 processor.
One thing to perhaps consider is the ease at which a sufficiently
actually the majority of SSB generators ARE reasonably phase coherent
over a relatively moderate passband with respect to their total
passband. The group delay 'ears' are on the edges of the filter. staying
between 600 and 2200 Hz should be OK for a 2400 Hz wide traditional
lattice sideband
Hi Glen and all,
There's something I don't understand here:
In the SM1000 we have control of all the amplitudes AND
phases of all the audio carriers. Thus we may be able to do something
to reduce the peak levels that an IDEAL SSB generator will produce.
This is where I have a problem, the
Alan
it already goes through an SSB generator, and is already bandwidth
constrained. The bandwidth expansion because of an excess PAPR event
occurs where the signal cannot be faithfully reproduced- that is stages
beyond the sideband modulator- mostly the power amplifier, but in
reality all
Hi David and Glen,
Just how is this going to be effective when the audio signal
is passed through an SSB generator?
You will also have to, in the maths, factor this in.
Am I wrong here?
Alan VK2ZIW
On Mon, 22 Jun 2020 07:49:45 +1000, glen english wrote
> I was giving some thought to how PAPR
I was giving some thought to how PAPR reduction might be implemented
within the current framework, taking into account the limited capability
of the SM1000 processor.
If we approach this on trying to constrain the statistical likelihood
of a PAPR event (where the peak power exceeds some
