Pulse or digital communications – Repeaters – Testing
Patent
1993-07-30
1995-09-19
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
380 46, H04B 169
Patent
active
054523281
ABSTRACT:
A method and apparatus for electrically generating sets of binary spreading-code sequences for use in a multi-node communication network are disclosed. A method for assigning disjoint sets of binary spreading-code sequences to different nodes of such a network is also disclosed. Each set of binary spreading-code sequences consists of multiple sequences, which are generated using two binary shift registers. The sequences can be generated simultaneously, or sequence segments can be generated sequentially. To generate sequences simultaneously, the contents of multiple pairs of stages of two linear-feedback binary shift registers are combined by modulo-2 addition, where each pair of stages consists of one stage from each of the two binary shift registers. To generate sequence segments sequentially, the contents of a single stage of a first binary shift register are combined by modulo-2 addition with the contents of a single stage of a second binary shift register, where new fills are switched into each of the registers at the beginning of each period. To assign disjoint sets of binary spreading-code sequences to different nodes of the network, the initial fill of the first binary shift register is fixed and different initial fills are specified for the second binary shift register.
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Cangialosi Salvatore
Lockheed Missiles & Space Company Inc.
Morrissey John J.
Radlo Edward J.
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