| 摘要 |
A method and apparatus for assigning Walsh codes in a direct sequence spread spectrum (DS-SS) telecommunications system. Walsh code sets are each generated from a different Walsh code Cx of length N. Each of the code sets is mutually disjoint to one another, i.e., each is generated from a different Walsh code Cx of length N, and each Walsh code Cx is from the same Walsh code matrix W. Each code set may be used to support a set of parallel CDMA channels. Because the codes of each Walsh code set are generated from the same Cx, a number of least significant bits from the code indexes of the codes in the set are equal and identical to the code index for the Cx used to generate the set. Assignment messages may be reduced in length by preassigning the code index of Cx to selected channels and then transmitting only the additional information necessary to specify the index of the assigned codes from the general code set generated from the Cx.
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