FIELD: physics.
SUBSTANCE: each satellite in a group employs a multilayer spreading code comprising at least a primary code and a secondary code. Each satellite in the group is allocated a different secondary spreading code from the set of secondary spreading codes. The method involves generating an initial set of bit patterns, wherein each bit pattern represents a potential secondary spreading code. Bit patterns within the initial set of bit patterns are also optimised. As a result of optimisation, at least some of the bit patterns in the initial set are altered or replaced in order to create a final set of bit patterns for use as the set of secondary spreading codes.
EFFECT: high rate of establishing synchronisation.
25 cl, 13 dwg, 11 tbl, 1 app
