Rafael-Armament Development Authority Ltd.

Geotek Communications, Inc.

George Calhoun

Mordechai Ritz

Giora Silbershatz

Noam Livneh

Oliver Hilsenrath

A multiple access communications system reuses a set of either N carrier frequencies or time slots in adjacent communications sites to provide more than N or T minimally cross-correlated frequency or time hopping communications channels respectively. A first set of communications channels is associated with a first of the communications sites. No two of the channels in the first set employ the same frequency or T time slots at the same time. A second set of communications channels is associated with a second of the adjacent communications sites. No two of the channels in the second set of channels employ the same one of the N carrier frequencies or T time slots at the same time. One or more sets of the minimally cross-correlated channels are further defined so that none of the channels in such sets employ the same frequency at the same time as more than a predetermined number of the channels in another of the sets of the minimally cross-correlated frequency-hopping communications channels. This is accomplished by having such other sets be a decimated transformation of the first or second set respectively.

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George Calhoun