Preamble detection using frequency based correlation

Details Preamble detection using frequency based correlation Preamble detection using frequency based correlation

2006-12-08

2009-10-20

Ngo, Ricky (Department: 2416)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

C370S203000, C370S208000, C370S329000, C375S316000

Reexamination Certificate

active

07606139

ABSTRACT:
A method for detecting a preamble location in a multiple preamble OFDM (Orthogonal Frequency Division Multiplexing) system is disclosed. An OFDM signal is generated with a plurality of frames, and each of the frames includes symbols and a predetermined preamble symbol. A maximum FDDC (Frequency Domain Differential Correlator) value is computed for each of the symbols in some of the frames. The preamble location in a frame is determined by summing the maximum FDDC value for each symbol at a same frame location in consecutive frames of the OFDM signal.

REFERENCES:
patent: 7561628 (2009-07-01), Sung et al.
patent: 2005/0152317 (2005-07-01), Awater et al.
patent: 2006/0078040 (2006-04-01), Sung et al.
patent: 2008/0107200 (2008-05-01), Zhu et al.

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