Multiplex communications – Generalized orthogonal or special mathematical techniques
Reexamination Certificate
2007-08-28
2007-08-28
Kizou, Hassan (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
C370S208000, C370S335000, C370S509000
Reexamination Certificate
active
10228659
ABSTRACT:
A preamble sequence generating apparatus and method in a BWA communication system using OFDM. An ARM code generator generates at least one ARM code of a different length. A sub-carrier selection and frequency mask unit maps a second number of ARM code components to a second number of sub-carriers among a third number of OFDM sub-carriers distributed equally in a frequency band and maps null components to sub-carriers excluding from the second number of sub-carriers. Here, the second number being the number of (the components of the ARM code) minus (a DC component and a first number of ARM code components set to prevent adjacent channel interference). Then, an IFFT generates a preamble sequence by inverse-fast-Fourier-transforming the sub-carriers received from the sub-carrier and frequency mask unit.
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Kizou Hassan
O'Connor Brian T.
The Farrell Law Firm
LandOfFree
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