| Pat.#3705981: | Sequency filters based on Walsh functions for signals with two space variables | ||
| INVENTORS: | Harmuth; Henning Friedolf, Bethesda, MD | ||
| ASSIGNEES: | Ammco Tools, Inc., North Chicago, IL | ||
| ISSUED: | Dec. 12, 1972 | ||
| FILED: | Oct. 5, 1970 | ||
| ABSTRACT: The present invention relates to a sequency sampling filter based on Walsh functions for signals having two space variables, x and y. Voltages derived from the x, y plane of a space domain are transformed into voltages in the k,m plane of the sequency domain. The filtering process is performed by not feeding certain voltages a(k,m) to the circuit which performs the inverse transformation of voltages in the sequency domain back into the space domain. | |||