A double half-bandwidth OFDM system for digital video broadcasting

To cope with the frequency selective and time-variant channel it is a good solution to combine an orthogonal frequency division multiplexing (OFDM) technique and a coding scheme. This article presents a particular use of a coded-OFDM with guard-interval (ICOFDM) to provide transmission with one enhanced definition TV or two standard definition TV signals in a 7 MHz bandwidth. In the paper frequency arrangements of the TV channel and RF filters features are also suggested. Performance results, obtained by computer simulation, on the selective Rayleigh channel with different spread delay values, for a ICOFDM system, using 8PSK coder and BCH block code (127,106,3) are reported as an example. An experimental set-up of ICOFDM 8PSK will be tested as soon as possible