Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2005-02-01
2009-08-04
Sobutka, Philip J (Department: 2618)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S504000
Reexamination Certificate
active
07570666
ABSTRACT:
An apparatus and method for guard interval detection in a multi-carrier receiver has been disclosed. According to the present invention, the apparatus and method are employed for determining a guard interval length of an input signal to be one of a plurality of available guard interval lengths. The apparatus of the present invention includes an auto-correlator, a power density calculator and a maximum detector. The auto-correlator is used to generate a correlation result in response to the input signal, and the power density calculator is used to generate a plurality of power density results in response the correlation result and the available guard interval lengths. The maximum detector is employed to generate a determination result in response to the maximum value of the plurality of power density results.
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Shiou-Hong Chen, et al. Mode Detection, Synchronization, and Channel Estimation for DVB-T OFDM Receiver, Globecom, 0-7803-7974-8/3 (2003), pp. 2416-2420.
Alston & Bird LLP
Industrial Technology Research Institute
Sobutka Philip J
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