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Apparatus for generating a complex composite code for fast acquisition by multiple access users is provided which comprises a composite code generator having an in-phase channel code generator and a quadrature channel code generator for generating two linear composite codes. The quadrature channel c

Apparatus for generating a complex composite code for fast acquisition by multiple access users is provided which comprises a composite code generator having an in-phase channel code generator and a quadrature channel code generator for generating two linear composite codes. The quadrature channel composite code is modulated onto a carrier which is 90°out of phase with the in-phase carrier. The two linear composite codes are summed together and simultaneously transmitted to the receivers. Each receiver has a plurality of components code generators which generate replica component codes for fast acquisition of the composite code. A plurality of the components codes of the in-phase composite code are derived from the like components code generators in the quadrature channel to enhance speed of acquisition without acknowledgements by the receivers that any of the components codes have been acquired.

대표청구항 ▼

Apparatus for generating a complex composite code for fast acquisition by multiple users, comprising: a quadrature channel composite code generator having a plurality of individual component code generators coupled thereto and means for combining said component codes in a manner which provides a com

Apparatus for generating a complex composite code for fast acquisition by multiple users, comprising: a quadrature channel composite code generator having a plurality of individual component code generators coupled thereto and means for combining said component codes in a manner which provides a composite code in a quadrature channel having partial correlation between said individual component codes and the combined composite code, an in-phase channel composite code generator having a plurality of individual component code generators coupled thereto and means for combining said component codes in a manner which provides a composite code in an in-phase channel ideally having no correlation between said individual component codes and the combined in-phase channel composite code, means for deriving individual component codes in said in-phase channel from corresponding individual component code generators in said quadrature channel so that the derived individual component codes are in-phase with corresponding individual component codes, carrier generation means, modulator means for combining said in-phase channel composite code and said quadrature channel composite code onto said carrier so that said composite codes are combined as a complex carrier modulated code, and a source of data coupled to one of said composite codes.