Title:
WIRELESS TRANSMISSION-RECEPTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/089714
Kind Code:
A1
Abstract:
A wireless transmission-reception system (100) which includes a transmission apparatus (101) and reception apparatus (151). The transmission apparatus (101) is provided with: a clock supplying unit (102) which generates a clock signal; a data generation unit (103) which generates fixed data having a bit value corresponding to the clock signal; and a packet generation unit (104) which performs OFDM modulation on the fixed data to generate an OFDM packet. The reception apparatus (151) is provided with: a wave-detection unit (154) which detects the envelope of the OFDM packet to obtain an envelope signal; a comparator unit (155) which compares the envelope signal with a threshold value to generate a rectangular signal; a detection unit (156) which detects the header of the OFDM packet; a PLL unit (158A) which extracts a synchronous clock signal, which is synchronized with the clock signal, from the main frequency component of the rectangular signal; and a control unit (157) which controls the operations of the PLL unit (158) until the elapse of a period including one or more OFDM packets from the time that the header was detected.
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Inventors:
AKITA KOJI (JP)
SEKIGUCHI TAKAHIRO (JP)
NAKANISHI TOSHIYUKI (JP)
SEKIGUCHI TAKAHIRO (JP)
NAKANISHI TOSHIYUKI (JP)
Application Number:
PCT/JP2010/050835
Publication Date:
July 28, 2011
Filing Date:
January 22, 2010
Export Citation:
Assignee:
TOSHIBA KK (JP)
AKITA KOJI (JP)
SEKIGUCHI TAKAHIRO (JP)
NAKANISHI TOSHIYUKI (JP)
AKITA KOJI (JP)
SEKIGUCHI TAKAHIRO (JP)
NAKANISHI TOSHIYUKI (JP)
International Classes:
H04J11/00; H04L7/033
Foreign References:
| JPH08265292A | 1996-10-11 | |||
| JPH11163825A | 1999-06-18 | |||
| JPH1051419A | 1998-02-20 | |||
| JPH0730513A | 1995-01-31 | |||
| JP2003046494A | 2003-02-14 | |||
| JP2003188931A | 2003-07-04 | |||
| JP2001186200A | 2001-07-06 | |||
| JPH07283807A | 1995-10-27 |
Other References:
P. H. MOOSE: "A technique for orthogonal frequency division multiplexing frequency offset correction", IEEE TRANS. COMMUN., vol. 42, no. 10, October 1994 (1994-10-01), pages 2908 - 2914, XP002019915, DOI: doi:10.1109/26.328961
T. SEKIGUCHI ET AL.: "Development of Digital Wireless Transceiver for an MRI Coil with Clock Synchronization", ISMRM, 2009
P. H. MOOSE: "A Technique for Orthogonal Frequency Division Multiplexing Frequency Offset Correction", IEEE TRANS. COMMUN., vol. 42, no. 10, October 1994 (1994-10-01), pages 2908 - 2914, XP002019915, DOI: doi:10.1109/26.328961
T. SEKIGUCHI ET AL.: "Development of Digital Wireless Transceiver for an MRI Coil with Clock Synchronization", ISMRM, 2009
P. H. MOOSE: "A Technique for Orthogonal Frequency Division Multiplexing Frequency Offset Correction", IEEE TRANS. COMMUN., vol. 42, no. 10, October 1994 (1994-10-01), pages 2908 - 2914, XP002019915, DOI: doi:10.1109/26.328961
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (JP)
Takehiko Suzue (JP)
Takehiko Suzue (JP)
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Claims: