Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2011-04-05
2011-04-05
Vu, Huy D (Department: 2461)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S292000
Reexamination Certificate
active
07920599
ABSTRACT:
Methods and systems for synchronizing wireless transmission of data packets is provided. Signals having a data packet frame format including a preamble (with a pattern of symbol sequences) and data are received, and patterns of symbol sequences are correlated. A first metric can be calculated that is a ratio of an average of the correlation values and an average of a power of the signals. A second metric can be calculated that defines an average of a power of noise in the signals. The methods include determining an approximate division of the preamble and data in the data packet of each signal based on the first and second metrics. The methods further include determining a cross-correlation between versions of a transmitted signal to produce a number of peaks equal to a number of transmit antennas, generating a third metric based on combinations of cross-correlations, and identifying a position of a maximum peak within the third metric as a fine timing offset amount.
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Subramanian Srikanth
Viswanathan Sathish
Anna University
KBC Research Foundation
Lamont Benjamin
McDonnell Boehnen & Hulbert & Berghoff LLP
Vu Huy D
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