Apparatus and method for digital wireless communications

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United States of America Patent

PATENT NO 6748023
SERIAL NO

10427992

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.

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Patent Owner(s)

  • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;SUN PATENT TRUST

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsuoka, Akihiko Yokohama, JP 195 3220
Murakami, Yutaka Yokohama, JP 793 6711
Orihashi, Masayuki Ichikawa, JP 218 3555
Takabayashi, Shinichiro Kawasaki, JP 52 1008

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