Methods and apparatus for identifying a preamble sequence and for estimating an integer carrier frequency offset

A wireless device that is configured to identify a preamble sequence and to estimate an integer carrier frequency offset, comprising:

• a processor;
• memory in electronic communication with the processor;
• instructions stored in the memory, the instructions being executable to:
• determine a reduced set of integer carrier frequency offset (CFO) candidates corresponding to a received signal that comprises a preamble sequence from a set of possible preamble sequences;
• perform correlation operations with respect to the received signal and multiple candidate transmitted signals, wherein each candidate transmitted signal comprises one of the set of possible preamble sequences, wherein each candidate transmitted signal corresponds to one of the reduced set of integer CFO candidates, and wherein correlation values are determined as a result of the correlation operations;
• and
• use the correlation values to identify the preamble sequence and to estimate the integer CFO.

An apparatus that is configured to identify a preamble sequence and to estimate an integer carrier frequency offset, comprising:

• means for determining a reduced set of integer carrier frequency offset (CFO) candidates corresponding to a received signal that comprises a preamble sequence from a set of possible preamble sequences;
• means for performing correlation operations with respect to the received signal and multiple candidate transmitted signals, wherein each candidate transmitted signal comprises one of the set of possible preamble sequences, wherein each candidate transmitted signal corresponds to one of the reduced set of integer CFO candidates, and wherein correlation values are determined as a result of the correlation operations;
• and
• means for using the correlation values to identify the preamble sequence and to estimate the integer CFO.

A computer-program product for identifying a preamble sequence and for estimating an integer carrier frequency offset, the computer-program product comprising a computer readable medium having instructions thereon, the instructions comprising:

• code for determining a reduced set of integer carrier frequency offset (CFO) candidates corresponding to a received signal that comprises a preamble sequence from a set of possible preamble sequences;
• code for performing correlation operations with respect to the received signal and multiple candidate transmitted signals, wherein each candidate transmitted signal comprises one of the set of possible preamble sequences, wherein each candidate transmitted signal corresponds to one of the reduced set of integer CFO candidates, and wherein correlation values are determined as a result of the correlation operations;
• and
• code for using the correlation values to identify the preamble sequence and to estimate the integer CFO.