Pseudo-random sequence mapping in wireless communications
AssigneeQUALCOMM Incorporated
InventorsDurga Prasad Malladi, Juan Montojo
Life of this patent
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Abstract
Systems and methodologies are described that facilitate scrambling of downlink reference signals utilizing a pseudo-random sequence (PRS) corresponding to a primary synchronization code (PSC) and secondary synchronization code (SSC) combination. In an aspect, a method includes receiving a scrambled downlink reference signal, determining a pseudo-random sequence based on received PSC and SSC, and descrambling a portion of subframes of the downlink reference signal according to the pseudo-random sequence and a determined cyclic prefix length for one or more of the portion of subframes.
Claims29
A method for wireless communications, comprising:
- receiving a scrambled downlink reference signal;
- determining a pseudo-random sequence based on received primary and secondary synchronization codes that directly map to the pseudo-random sequence;
- and
- descrambling a portion of subframes of the scrambled downlink reference signal according to the pseudo-random sequence and a determined cyclic prefix length for one or more of the portion of subframes.
A wireless communications apparatus, comprising:
- at least one processor configured to:
- receive a scrambled downlink reference signal,
- determine a pseudo-random sequence based on received primary and secondary synchronization codes that directly map to the pseudo-random sequence, and
- descramble a portion of subframes of the scrambled downlink reference signal according to the pseudo-random sequence and a determined cyclic prefix length for one or more of the portion of subframes;
- and
- a memory coupled to the at least one processor.
A non-transitory computer-readable medium, comprising:
- code for causing at least one computer to receive a scrambled downlink reference signal;
- code for causing the at least one computer to determine a pseudo-random sequence based on received primary and secondary synchronization codes that directly map to the pseudo-random sequence;
- and
- code for causing the at least one computer to descramble a portion of subframes of the scrambled downlink reference signal according to the pseudo-random sequence and a determined cyclic prefix length for one or more of the portion of subframes.
A method for wireless communications, comprising:
- generating a downlink reference signal comprising primary and secondary synchronization codes;
- scrambling the downlink reference signal based at least in part on a pseudo-random sequence that directly maps to combination of the primary and secondary synchronization codes;
- and
- transmitting the scrambled downlink reference signal.
A wireless communications apparatus, comprising:
- at least one processor configured to:
- generate a downlink reference signal comprising primary and secondary synchronization codes,
- scramble the downlink reference signal based at least in part on a pseudo-random sequence that directly maps to combination of the primary and secondary synchronization codes, and
- transmit the scrambled downlink reference signal;
- and
- a memory coupled to the at least one processor.
A non-transitory computer-readable medium, comprising:
- code for causing at least one computer to generate a downlink reference signal comprising primary and secondary synchronization codes;
- code for causing the at least one computer to scramble the downlink reference signal based at least in part on a pseudo-random sequence that directly maps to combination of the primary and secondary synchronization codes;
- and
- code for causing the at least one computer to transmit the scrambled downlink reference signal.
Dependencies are inferred from the claim text.