Apparatus and method for detecting packet of zero-padded...

Details Apparatus and method for detecting packet of zero-padded... Apparatus and method for detecting packet of zero-padded...

2008-08-12

2011-10-25

Yao, Kwang B (Department: 2473)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

Reexamination Certificate

active

08045448

ABSTRACT:
Provided is an apparatus and method for detecting a packet of a zero-padded OFDM signal, which are capable of determining if a packet exists in a reception (RX) signal by comparing a cross-correlation value of an OFDM signal delayed by a predetermined sample time, e.g., a zero-padded sample time, with a power value of the RX signal, thereby increasing a packet detection probability and preventing a false alarm. The packet detecting apparatus includes: a cross-correlation calculator for calculating a cross-correlation value of a reception signal received from the outside and delaying the calculated cross-correlation value by a predetermined sample time; a power calculator for calculating a power value of the reception signal; and a packet detector for determining if a packet exists in the reception signal by comparing the delayed cross-correlation value with the calculated power value, and detecting the corresponding packet.

REFERENCES:
patent: 7158541 (2007-01-01), Sawada et al.
patent: 7539241 (2009-05-01), Dick
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Korean Notice of Allowance issued on Apr. 29, 2009 in corresponding Korean Patent Application 10-2007-0127737.
Alan J. Coulson, “Maximum Likelihood Synchronization for OFDM Using a Pilot Symbol: Algorithms” (2001 IEEE Journal on Selected Areas in Communications, vol. 19, No. 12, pp. 2486-2494, Dec. 2001).

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