Thanks yes I've seen it. I'm currently focussed on other things. Also based on my experiments of 1 year ago I'm not sure if PAPR improvements will give us much gain on most of today's HF radios.
- David On Wed, 2014-03-05 at 14:38 -0800, Bruce Perens wrote: > I've copied this to David, perhaps it can give him some additional > handle on PAPR while designing his new waveform, if he's not already > aware of it. > > On March 5, 2014 7:32:10 AM PST, Ham Radio Java > <[email protected]> wrote: > > > > On Sun, Mar 2, 2014 at 4:21 PM, Bruce Perens > <[email protected]> wrote: > > > I don't even know how anyone got OFDM to work with an > amplifier designed > for SSB. > > > I went back and read some of my notes off of g4guo's web site, > and one of them was: > > > "The waveform uses clipping to reduce the peak to mean ratio, > followed by filtering. Each tone starts at a different phase > offset to try to reduce the crest factor. The phase offsets > were calculated using Newman Phase Generation." > > > I remember looking-up Newman Phase Generation, and found > mostly mathematics buried in greek and egyption symbols and > promptly forgot about it. I did another search now, and > found: > > > http://www.stanford.edu/~boyd/papers/pdf/multitone_low_crest.pdf > > > Which is actually readable by an undergraduate who hid in the > back during calculus... > Google search finds a bunch of poop: > > > https://www.google.com/#q=newman+phase+generation+crest+factor > > > > have fun, > steve > > ______________________________________________________________ > > Subversion Kills Productivity. Get off Subversion & Make the Move to > Perforce. > With Perforce, you get hassle-free workflows. Merge that actually > works. > Faster operations. Version large binaries. Built-in WAN optimization > and the > freedom to use Git, Perforce or both. Make the move to Perforce. > > http://pubads.g.doubleclick.net/gampad/clk?id=122218951&iu=/4140/ostg.clktrk > > > ______________________________________________________________ > > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ Subversion Kills Productivity. Get off Subversion & Make the Move to Perforce. With Perforce, you get hassle-free workflows. Merge that actually works. Faster operations. Version large binaries. Built-in WAN optimization and the freedom to use Git, Perforce or both. Make the move to Perforce. http://pubads.g.doubleclick.net/gampad/clk?id=122218951&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
