This page contains two diagrams from my August 1996 article on the Optus Vision HFC network telephony technology. See http://www.firstpr.com.au/ telco/articles/index.html#A9608 for more details.
Figure 2 describes OFDM and compares the symbol times of ADC's OFDM and Motorola's DPQSK.
The quality of the text layout has suffered in the conversion of these diagrams from an early Freehand file type, via Adobe Illustrator, into Corel Draw 3 and then to .GIF. The diagrams in the magazines look fine.
Copyright 1996 Robin Whittle - First Principles Consulting
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