Might be worth the time to review how Digital Radio Mondiale configures their robust modes using OFDM. The DRM spec is here: http://www.etsi.org/deliver/etsi_es/201900_201999/201980/03.01.01_50/es_201980v030101m.pdf
Mel ----- Original Message ----- From: "Bruce Perens" <[email protected]> To: <[email protected]> Sent: Wednesday, June 05, 2013 3:22 PM Subject: Re: [Freetel-codec2] Building on Windows > Add "4) Is the linearity of Amateur equipment intended for SSB voice and > lacking in headroom beyond its rated power really adequate for this > modulation?" > > On 06/05/2013 01:16 PM, Frank Palazzolo wrote: >> >> >> The questions I am trying to answer are: >> 1) Will the orthogonality of the OFDM carriers be degraded >> significantly by the HF channel, compared to FDM? >> 2) If not, can we take advantage of that spectrum 'between the >> carriers' that FDMDV is not using? >> 3) If we keep a symbol rate of 50Hz with a carrier spacing of 75Hz, >> this is equivalent to a 6.67ms guard band. Will having this guard >> band in time rather than spacing between carriers be more robust to >> multipath? >> > > > ------------------------------------------------------------------------------ > 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
