SPECTRUM SPREAD COMMUNICATION SYSTEM

WIPO Patent Application WO/2011/158681

A1

Disclosed is a spectrum spread communication system which is hardly influenced by a noise, and can identify a frame structure at the reception side if a frame synchronization signal is not transmitted. A spread code generator (42) switches spread codes (Scai, Scbi) for each frame, and outputs to a spread/modulation unit (41). The spread/modulation unit (41) spreads and modulates transmission data and transmits to a direct current power line (2). A reference code generator (44) generates reference codes (Scai, Scbi) at the same code phase. Spread/demodulation units (43a, 43b) spread and demodulate the received signal using the reference codes (Scai, Scbi), and output to a selection unit (47). A frame synchronization detection unit (46) identifies a frame structure on the basis of the switching of synchronization states of the code phase in a code phase synchronization detection unit (45). The selection unit (47) outputs reception data by selecting the spread/demodulated data output from the phase-synchronized spread/demodulation unit among the spread/demodulation units (43a, 43b).

KASAI Yuji (1-1 Umezono 1-chome, Tsukuba-sh, Ibaraki 68, 〒3058568, JP)
河西　勇二 (〒68 茨城県つくば市梅園１－１－１　中央第２　独立行政法人産業技術総合研究所内 Ibaraki, 〒3058568, JP)

JP2011/062909

December 22, 2011

June 06, 2011

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NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (3-1 Kasumigaseki 1-chome, Chiyoda-ku Tokyo, 21, 〒1008921, JP)
独立行政法人産業技術総合研究所 (〒21 東京都千代田区霞が関１丁目３番１号 Tokyo, 〒1008921, JP)
KASAI Yuji (1-1 Umezono 1-chome, Tsukuba-sh, Ibaraki 68, 〒3058568, JP)
河西　勇二 (〒68 茨城県つくば市梅園１－１－１　中央第２　独立行政法人産業技術総合研究所内 Ibaraki, 〒3058568, JP)

H04B1/707; H02J13/00; H04B3/54; H04J13/16; H04Q9/00

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