Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2006-02-21
2006-02-21
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C455S018000, C375S343000
Reexamination Certificate
active
07003415
ABSTRACT:
A delay profile estimation apparatus and a correlating unit to obtain delay profile with suppressed noise are disclosed. The delay profile estimation apparatus includes a receiving unit to receive a communication signal (received signal), a conversion unit to inverse-Fourier-transform a known pilot signal that consists of N samples, a correlating unit to obtain a correlation value between the inverse-Fourier-transformed known pilot signal and the received signal, the correlating unit being connected to the receiving unit and the conversion unit, and a delay profile generating unit for generating a delay profile of the received signal based on the correlation value. The correlating unit cyclically shifts N samples of the received signal, or the N samples of the known pilot signal when calculating the correlation value corresponding to a phase difference between the inverse-Fourier-transformed known pilot signal and the received signal.
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Akinori Taira, et al., “A Timing Synchronization Scheme for OFDM in Frequency Selective Fading Environment,” The Institute of Electronics, Information and Communication Engineers, vol. J84-B, No. 7, pp. 1255-1264, Jul. 2001.
Jitsukawa Daisuke
Seki Hiroyuki
Tanaka Yoshinori
Baran Mary Catherine
Fujitsu Limited
Hoff Marc S.
Staas & Halsey , LLP
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