As an aside I imagine the carriers could be made a little closer (like 25%) without significant degradation in BER at our usual SNR operating points. This could be easily tested with the Octave simulations.
- David On Wed, 2013-06-05 at 13:37 -0700, Bruce Perens wrote: > Yes, in theory you can do without the guard bands, which is worthy of > exploration. But you can slow down the symbol rate or use fewer > carriers, so you don't really have to transmit faster. > > On 06/05/2013 01:32 PM, Gullik Webjörn wrote: > > > This is something I raised a year ago or so. I have been learned > > that the very reason to use ofdm is > > that the "next" carrier is located on the "previous" and the > > "nextnext" NULL, i.e. there is a minimum > > "right there", and that given imperfect filtering, with the integer > > relation between carrier spacing > > and baud rate do 2) below. Net effect, still in MY head, is that you > > could either increase signalling > > to 75 baud, or squeeze carriers together. Now, signalling at 75 baud > > instead of 50, will burden > > us CPU-wise, since all maths done in 20 mS must now be done in 13.33 > > mS. I guess the answer probably > > lies in 3). > > > > One more very interested... > > > > Gullik > > > > ------------------------------------------------------------------------------ > How ServiceNow helps IT people transform IT departments: > 1. A cloud service to automate IT design, transition and operations > 2. Dashboards that offer high-level views of enterprise services > 3. A single system of record for all IT processes > http://p.sf.net/sfu/servicenow-d2d-j > _______________________________________________ Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. A cloud service to automate IT design, transition and operations 2. Dashboards that offer high-level views of enterprise services 3. A single system of record for all IT processes http://p.sf.net/sfu/servicenow-d2d-j _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
