Construction of Sequences for Multi-group FH-FDMA in DRT System

Abstract

This paper presents a method of constructing frequency hopping sequences for military satellite communication system which employs frequency dehop-rehop transponder(DRT). In DRT system, the dehopping and rehopping is to be performed upon a group based approach where each group has its own hopping sequence and is characterized by synchronous connection-oriented(SCO) link. The hopping patterns generated through proposed method have optimal Hamming auto-correlation property according to Lempel-Greenberger bound and assure perfect orthogonality between hopping groups i.e. no chip collisions during the period. A practical implementation of the proposed method using shift registers is also described.