Multiplex communications – Communication over free space – Combining or distributing information via frequency channels
Reexamination Certificate
2011-04-12
2011-04-12
Santiago-Cordero, Marivelisse (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via frequency channels
C370S355000, C370S207000, C370S208000, C370S209000, C375S354000, C375S260000, C375S343000
Reexamination Certificate
active
07924801
ABSTRACT:
Provided is an apparatus and method for detecting a packet in a Wireless Local Area Network (WLAN) which can reduce a processing time of packet detection based on Orthogonal Frequency Division Multiplexing (OFDM) by detecting a received packet employing symmetry of a short preamble. The packet detecting apparatus includes an autocorrelation average power calculation unit for calculating an absolute value of an autocorrelation average power value obtained by delaying a preamble signal of a received signal by half of a preamble length, an average power calculation unit for calculating an average power value of the received signal, a power ratio calculation unit for calculating a ratio of the average power value to the absolute value of the average power value, and a packet detection unit for detecting the packet by using the power ratio calculated by the power ratio calculation unit.
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Kang Hun-Sik
Kim Do-Young
Chakour Issam
Electronics and Telecommunications Research Institute
Ladas & Parry LLP
Santiago-Cordero Marivelisse
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