Tracking a code modulated signal

Details Tracking a code modulated signal Tracking a code modulated signal

2006-10-17

2006-10-17

Lamarre, Guy J. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

C375S150000

Reexamination Certificate

active

07124352

ABSTRACT:
To reduce the complexity of the correlation in a correlation based tracking of a code modulated signal received at a receiver, received samples and available replica samples are aligned to each other and the positions of the samples in the received signal and in the replica code sequences are grouped, each group comprising all positions at which the composition of the values of the samples of all of the replica code sequences is similar. The values of the received samples which are associated to a respective group are combined separately for each group to obtain a respective intermediate result. Then, a correlation value is determined for each replica code sequence by combining the intermediate results obtained for all groups separately for each replica code sequence, taking into account the values of the samples of the replica sequences in the respective group.

REFERENCES:
patent: 5818868 (1998-10-01), Gaudenzi et al.
patent: 6249542 (2001-06-01), Kohli et al.
patent: 6366938 (2002-04-01), Levison et al.
U.S. Appl. No. 10/406,152, filed Apr. 1, 2003, Title: Determining the Correlation Between Received Samples and Available Replica Samples.
PCT International Application No. PCT/IB02/04420, International Filing Date: Oct. 24, 2002, Title: Determination of the Correlation Phase Between a Signal and a Replica Sequence.

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