Spreading code acquisition for direct sequence spread...

Details Spreading code acquisition for direct sequence spread... Spreading code acquisition for direct sequence spread...

H - Electricity

04

J

H04J 13/10 (2011.01) H04B 1/707 (2011.01)

Patent

CA 2704353

The invention relates to a method and apparatus for acquiring a complex spreading code of a direct sequence spread spectrum signal (dsss) by acquiring a state of a spreading code generator capable of generating the complex spreading code. A sequence of bipolar differential product values, which sign is independent on data transmitted by the dsss signal, is obtained by combining in-phase and quadrature samples of the dsss signal for adjacent chip intervals. This sequence is provided to a linear block decoder for obtaining a codeword of a linear block code, which is defined by a structure of the spreading generator and the differential product operation. The codeword is used to compute the state of the spreading code generator.

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