I've managed to reduce the size of tx_filter_memory[] from 115200 bytes
to 720 bytes. Still thinking about rx_filter_memory[], that's a bit
more involved
On Tue, 2012-05-15 at 23:39 +0300, Sergiy wrote:
As I see, the largest buffers in FDMDV are two-dimensional arrays
On Tue, Jun 12, 2012 at 1:33 PM, Patrick Strasser OE6PSE
oe6...@wirklich.priv.at wrote:
Am 11.05.2012 03:44, schrieb Gregory Maxwell:
It should be noted that the OFDM modem with N-PSK carriers modulated
with a golay complementary sequence (a rate 1/2 FEC) provides a PAPR
of 3dB, which I think
Thanks Peter, rx_fdm_log[] is now malloc-ed from the heaps instead of
being allocated from the stack, and I added the fprintf line as well to
rev 454. Perhaps Windows has different stack limitations to Linux.
Cheers,
David
made On Sun, 2012-05-13 at 16:54 +0100, Peter wrote:
On 13 May 2012
On Thu, 10 May 2012 21:40:36 -0700
Bruce Perens br...@perens.com wrote:
On 05/10/2012 09:33 PM, David Rowe wrote:
However I think any form of PSK would still require a SSB tcvr, so
no HT.
When no part of the signal is carried as an amplitude variation, it
can be amplified using a
On Thu, 10 May 2012 21:30:44 -0700 (PDT)
Anthony Cutler acutle...@yahoo.com wrote:
I don't know of a single mass-market HT that does SSB on 2m.
TH-F7E (F6 in the US) has SSB on Rx only. I don't know of any that can
Tx SSB since the Mizuho series in the early 1980s.
--
Brian Morrison
On Fri, May 11, 2012 at 2:14 PM, Bruce Perens br...@perens.com wrote:
The reason that SSB transmission is in general not offered on HTs is that
much of the power of a linear PA ends up being turned into heat.
Hm. I thought it was also because they don't have stable and accurate
oscillators
On 05/11/2012 11:42 AM, Gregory Maxwell wrote:
On Fri, May 11, 2012 at 2:14 PM, Bruce Perensbr...@perens.com wrote:
The reason that SSB transmission is in general not offered on HTs is that
much of the power of a linear PA ends up being turned into heat.
Hm. I thought it was also because they
Hello Bruce List,
Some ideas of what a significant improvement over incumbent (analog and
1st gen DV) modes might be:
+ 6-12dB improvement in SNR for equivalent voice quality
+ half or a quarter of the RF BW
+ available in a $100 open hw/open sw box that sits between the Mic/Spkr
of any FM
Hi Bruce,
Good idea to bring this topic back on-list.
I have a couple of other comments:
1/ The current PAPR is for a canned test sequence of bits that repeats
itself every 80ms, not sure what it will be when the modem is driven by
codec data.
2/ FDMDV is designed for SSB radios, I don't think
On Thu, May 10, 2012 at 9:15 PM, Bruce Perens br...@perens.com wrote:
David, Mel, and I have been having a discussion of PAPR: peak vs. average
power ratio, off of the list. This is also called crest factor.
[snip]
Should we compress in software before feeding the amplifier, so that
clipping
10 matches
Mail list logo
