Hatim:
Your appearance on the thread is welcome and timely. Can you comment on the specific differences between COFDM and Wi-Lans implementation of WOFDM.
In particular,
...The Recent Development of COFDM.
Since the Commission's selection of the 8-VSB standard in 1996, there has been significant development of COFDM modulation technology.(Footnote 25) The Digital Video Broadcasting Project ("DVB"), a global organization consisting of broadcasters, manufacturers, network operators, and regulatory bodies, began work on this technology in 1995. In 1997, DVB finalized its "DVB-T" digital television transmission format, and this standard was approved by the European Telecommunications Standards Institute (ETSI) in February 1997. The manufacture of commercial COFDM decoder chips began in 1997, and COFDM chips were available for installation into commercial DTV receivers in 1998. The DVB- developed DTV transmission system is highly sophisticated, supporting 120 different operational modes, HDTV service, multichannel SDTV services, mobile television applications, and reliable reception with simple antennas.
The benefits of COFDM have led numerous countries all over the world to adopt this technology for their digital television systems. As of the date of this petition, Sinclair is aware that COFDM has been selected as the DTV modulation standard in the all of the European Union nations, including Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, the Netherlands, Portugal, Spain, Sweden, and the United Kingdom (ñU.K.Ñ). COFDM has also been chosen for digital modulation in Australia, India, Japan and Singapore....
Footnote 25 COFDM technology was truly developed internationally. The development of COFDM began at Bell Labs in New Jersey in the 1960's, with subsequent work on this technology performed by Canadian researchers in the 1980's, as well as by researchers at the Massachusetts Institute of Technology. In the early 1990's, there were European demonstrator systems developed. As indicated above, the DVB organization, headquartered in Switzerland, started development of COFDM in 1995, and produced the first COFDM standard in 1997. Commercial implementation of COFDM followed in 1998. In parallel, Japan developed the ISDB- T system over the past couple of years, also using COFDM. All of the leading COFDM silicon vendors, including LSILogic, Oak Technologies, and Motorola, are North American-owned companies. ...
sbgi.net
You will note from the reference that COFDM supports data rates of 18.7 mbps in a 6 MHz channel. While it has been discussed before on this thread, I would appreciate your definition: what constitutes wideband?
Sincerely,
ww
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