Impulse radio communication device

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

Reexamination Certificate

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Details

C375S343000, C375S316000, C375S147000, C375S140000, C375S150000

Reexamination Certificate

active

07630460

ABSTRACT:
An impulse radio communication device includes a wave detector for generating a detected signal, a switching section for selecting either a received signal or the detected signal in accordance with an external control signal and outputting it as a demodulation target signal, a reference waveform generating section synchronized with the demodulation target signal and generating a reference waveform signal having a different waveform in accordance with the external control signal, a demodulator for generating a demodulated signal from the demodulation target signal in accordance with the reference waveform signal, and a decoding section for decoding received data from the demodulated signal. This impulse radio communication device switches the demodulation target signal and the reference waveform signal simultaneously in accordance with a receiving and synchronizing state. This makes it difficult that synchronization is pulled in a correlation position having low electric power, and can reduce a acquisition time.

REFERENCES:
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patent: 6188654 (2001-02-01), Kaku et al.
patent: 2003/0063025 (2003-04-01), Low et al.
patent: 2003/0108133 (2003-06-01), Richards
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patent: 2005/0100079 (2005-05-01), Sanada et al.
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patent: 2003-535552 (2003-11-01), None
patent: 2004-096469 (2004-03-01), None
patent: 2004-309896 (2004-10-01), None
patent: 2006-121609 (2006-05-01), None
patent: WO 01/93441 (2001-12-01), None
International Search Report for Application PCT/JP2006/304444, dated May 30, 2006.

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