Secondary synchronization codebook for E-utran
AssigneeQUALCOMM Incorporated
InventorsTao Luo, Peter Gaal, Ke Liu, Arun Kannu
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Abstract
Providing for secondary synchronization encoding utilizing a primary synchronization channel (P-SCH)-related scrambling code is described herein. Scrambled secondary synchronization codes (SSCs) can be assigned to multiple base stations of a radio access network (RAN). By way of example, PSC-based scrambling codes can be created from a plurality of M-sequences generated from a common polynomial expression. Further, an SSC codebook is provided that selects sequence pairs of a sequence matrix for generating SSCs. Selection can be based on transmission characteristics of resulting SSCs, providing reduced interference in planned, semi-planned and/or unplanned mobile deployments.
Claims25
A method for generating a secondary synchronization code (SSC) for wireless communication, comprising:
- generating a sequence matrix from a base M-sequence and cyclic shifted variations of the base M-sequence;
- scrambling at least one M-sequence of the sequence matrix with a common binary scrambling code based on a primary synchronization code (PSC) associated with the wireless communication;
- generating an SSC based on the at least one scrambled M-sequence;
- and
- mapping the SSC onto sub-carrier channels of an orthogonal frequency division multiplex (OFDM) transmission.
An apparatus for generating an SSC for wireless communication, comprising:
- a logic processor that generates a sequence matrix from a base M-sequence and cyclic shifted variations of the base M-sequence;
- a data transformation module that scrambles at least one sequence of the matrix with a common binary scrambling code based on a PSC associated with the wireless communication;
- a multiplexing module that generates an SSC based on the at least one scrambled sequence;
- and
- a transmission processor that maps the SSC onto sub-carrier channels of an OFDM transmission.
An apparatus for generating an SSC for wireless communication, comprising:
- means for generating a sequence matrix from a base M-sequence and cyclic shifted variations of the base M-sequence;
- means for scrambling at least one sequence of the matrix with a common binary scrambling code based on a PSC associated with the wireless communication;
- means for generating an SSC based on the at least one scrambled sequence;
- and
- means for mapping the SSC onto sub-carrier channels of an OFDM transmission.
A processor configured to generate an SSC for wireless communication, comprising:
- a first module that generates a sequence matrix from a base M-sequence and cyclic shifted variations of the base M-sequence;
- a second module that scrambles at least one sequence of the matrix with a common binary scrambling code based on a PSC associated with the wireless communication;
- a third module that generates an SSC based on the at least one scrambled sequence;
- and
- a fourth module that maps the SSC onto sub-carrier channels of an OFDM transmission.
A non-transitory computer-readable medium, comprising:
- computer-readable instructions configured to generate an SSC for wireless communication, the instructions are executable by at least one computer to:
- generate a sequence matrix from a base M-sequence and cyclic shifted variations of the base M-sequence;
- scramble at least one sequence of the matrix with a common binary scrambling code based on a PSC associated with the wireless communication;
- generate an SSC based on the at least one scrambled sequence;
- and
- map the SSC onto sub-carrier channels of an OFDM transmission.
Dependencies are inferred from the claim text.