Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2011-06-28
2011-06-28
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S347000, C375S316000, C375S240270, C370S208000, C714S746000
Reexamination Certificate
active
07970082
ABSTRACT:
Embodiments include frequency offset correction when decoding a packet encoded in a frequency modulated signal. Different symbols encoded in the packet may be corrected by different frequency offsets. In an embodiment, the frequency modulated signal is received on one of the signals of a multi-carrier signal (e.g., based on Orthogonal Frequency Domain Multiplexing, OFDM) and each packet is encoded according to 802.11(a) having the same long sequence repeating multiple times in a header portion. The repetitive sequence is used to compute the different offsets for different symbols.
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T.M.Schmidl and D.Cox,“Robust frequency and timing synchronization for OFDM”,IEEE Transactions in Communications,pp. 1613-1621,vol. 45, No. 12, Dec. 1997.
Gunturi Sarma
Jaganathan Madhan Mohan
Brady W. James
Fan Chieh M
Malek Leila
Shaw Steven A.
Telecky , Jr. Frederick J.
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