Method for calculating the PN generator mask to obtain a desired shift of the PN code
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United States of America Patent
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Apr 29, 2003
Grant Date -
N/A
app pub date -
Sep 14, 1999
filing date -
Sep 22, 1998
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Abstract
A method and program for determining the PN generator mask which is required to obtain a specific shift of the PN sequence at the output of a phase shift network (PSN), relative to the reference sequence that is represented by the inverse of the characteristic polynomial of the PN sequence. The method applies for any initial loading (state) of the PN generator, which can be either the simple shift register generator (SSRG) type or the modular shift register generator (MSRG) type of linear feedback shift register (LFSR). The application of the present invention includes, but is not limited to, any code division multiple access (CDMA) cellular telephone system which requires a method for generating specific shifts of a given reference PN sequence for each base station and each mobile station in the network.
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