Apparatus and method for generating and utilizing pseudonoise co

Coded data generation or conversion – Digital code to digital code converters

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364717, 380 46, 375208, H03M 700

Patent

active

055981542

ABSTRACT:
A set of independent pseudonoise (PN) component codes greater than two are combined in a manner which produces one or more I and Q uncorrelated orthogonal pairs of resulting combined PN sequences. At least two of the component codes in a resulting combined PN sequence are combined in a manner which produces an overall imbalance of ones and zeros in the binary expression of the resulting combined PN sequence so that the resulting composite code has a partial correlation with a predetermined one of the PN component codes. In the preferred embodiment, three component codes are combined to produce uncorrelated orthogonal pairs of composite codes wherein at least one of the pairs of composite codes is produced to have a partial correlation with one or more of the component codes.

REFERENCES:
patent: 5043988 (1991-08-01), Brglez et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5153532 (1992-10-01), Albers et al.
patent: 5323338 (1994-06-01), Hawthorne

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