| Pat. #3678204: | Signal processing and transmission by means of Walsh functions | ||
| INVENTORS: | Harmuth; Henning Friedolf, Bethesda, MD | ||
| ASSIGNEES: | International Telephone and Telegraph Corporation, Nutley, NJ | ||
| ISSUED: | Jul. 18, 1972 | ||
| FILED: | Oct. 26, 1970 | ||
| ABSTRACT: In the transmission by carrier waves a plurality of signals are produced and each multiplied by one of 12 Paley functions derived from a Hadamard matrix of rank 12. The resulting signals are added to form a multiplexed signal. The multiplexed signal is frequency limited by sampling it with a trigger function and passing the samples through a bandpass filter. Reconversion of the multiplex signal is accomplished at the receiver. | |||