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US Patent 9935681 Preamble sequence detection of direct sequence spread spectrum (DSSS) signals

Patent 9935681 was granted and assigned to Texas Instruments on April, 2018 by the United States Patent and Trademark Office.

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Patent abstract

A direct sequence spread spectrum (DSSS) receiver includes an antenna, signal-to-noise ratio (SNR) estimation logic, and preamble detection logic. The antenna is configured to receive a DSSS signal. The SNR estimation logic is configured to estimate SNR of the received DSSS signal. The preamble detection logic is configured to, in response to the SNR estimate exceeding a SNR threshold value, detect a preamble sequence in the DSSS signal based on an absolute value of a sequence of correlation values. The sequence of correlation values is a complex quantity.

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