Apparatus and Method For Generating Scrambling Codes
OwnerJoshua Lawrence Koslov, Wen Gaoinventors
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Abstract
A wireless WCDMA (wideband code division multiple access) receiver comprises a plurality of fingers, a mask engine, a plurality of delay mask scrambling code generators and a maximal ratio combiner. Each finger process a path of a received multi-path signal having an associated delay. For each of the delays, the mask engine provides a corresponding delay mask to a delay mask scrambling code generator, which then provides a scrambling code with the appropriate offset, or delay, to the requisite finger. Output signals from the fingers are provided to the maximal ratio combiner.
Claims15
An apparatus comprising:
- a mask engine for providing a delay mask associated with a delay;
- and
- a scrambling code generator responsive to the delay mask for providing an offset version of a scrambling code, where the offset corresponds to the delay.
A method for use in an apparatus, the method comprising:
- determining delay masks associated with at least one identified delay;
- and
- generating an offset scrambling code from each determined delay mask.
A method for use in a receiver, the method comprising:
- receiving a multi-path signal;
- performing a cell search operation to identify a scrambling code used to transmit the multi-path signal;
- identifying delays of the multi-path signal;
- assigning the identified delays to a number of fingers of a RAKE receiver;
- determining delay masks associated with each one of the identified delays;
- and
- generating an offset scrambling code from each determined delay mask for use by the respective one of the number of fingers assigned to the identified delay.
Dependencies are inferred from the claim text.