05291289 is referenced by 195 patents and cites 8 patents.

A method and apparatus for modulating and demodulating an MCM television signal is described which is particularly useful in proposed "simulcast" HDTV terrestrial broadcasting. The MCM spectrum of the television signal is shaped using weighting coefficients which are derived from either an idealized NTSC signal or an actual NTSC co-channel signal. These coefficients are used to shape the respective MCM carriers to provide an energy distribution in the MCM signal which provides greater degree of robustness with a minimum degree of co-channel interference to and from an NTSC co-channel signal. The instant invention further takes advantage of the interference characteristics of composite television signals described above, to position the placement of the MCM carriers in frequency, to minimize interference with an NTSC co-channel signal. Several methods of deriving the weighting coefficients are described including an adaptive approach whereby the characteristics of the interfering NTSC transmission are received and the instantaneous NTSC spectrum calculated therefrom and weighting coefficients assigned accordingly. These coefficients can be transmitted to a receiver to update its coefficient table.

Title
Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation
Application Number
774006
Publication Number
5291289
Application Date
March 20, 1992
Publication Date
March 1, 1994
Inventor
Carlo Basile
Ossining
NY, US
David A Bryan
Danbury
CT, US
Samir N Hulyalkar
Ossining
NY, US
Agent
Michael E Marion
Assignee
North American Philips Corporation
NY, US
IPC
H04L 23/02
H04L 5/12
H04N 7/06
H04N 5/40
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