Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2011-08-23
2011-08-23
Ha, Dac V (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
08005157
ABSTRACT:
A correlation calculation unit includes: four arithmetic units each including a first differential arithmetic section calculating a difference between an OFDM (orthogonal frequency division multiplexing) signal and a first delay signal, a second differential arithmetic section calculating a difference between a second delay signal and a third delay signal, and a multiplication section multiplying arithmetic results of the first and second differential arithmetic sections; four polarity conversion units converting arithmetic results of the multiplication sections of the corresponding arithmetic units into polarity signals indicating polarities of the arithmetic results, respectively; four integrating units integrating the polarity signals obtained by the corresponding polarity conversion units, respectively; and an addition unit adding up integrating results of the four integrating units, and outputting an addition result as a correlation signal indicating a correlation between the OFDM signal and the second delay signal.
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Ha Dac V
Haider Syed
Oki Semiconductor Co., Ltd.
Volentine & Whitt PLLC
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