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Title:
SECURE COMMUNICATION METHOD, TRANSMITTING DEVICE, AND RECEIVING DEVICE
Document Type and Number:
Japanese Patent JP2005110228
Kind Code:
A
Abstract:

To improve secureness in communication higher than that of a conventional method by transmitting signals from a plurality of antennas.

An antenna changing part 105 stores a antenna changing pattern in an internal memory, generates an antenna changing signal indicating an antenna change according to the antenna changing pattern for each clock signal input, and outputs the signal to an antennal selecting part 106. On the basis of the antenna changing signal, the antenna selecting part 106 selects two different antennas from among transmitting antennas 107-1 to 107-3 as transmitting antennas of a transmitting signal A outputted from a radio part 104-1 and a transmitting signal B outputted from a radio part 104-2. Then the antennal selecting part 106 transmits the transmitting signals A and B by radio using the selected transmitting antennas.


Inventors:
KOBAYASHI SEIHO
MURAKAMI YUTAKA
ORIHASHI MASAYUKI
MATSUOKA AKIHIKO
Application Number:
JP2004258919A
Publication Date:
April 21, 2005
Filing Date:
September 06, 2004
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04K1/00; H04B7/02; H04B7/06; H04B7/08; H04J11/00; H04J99/00; H04W12/00; H04W16/28; H04W84/12; H04W88/02; H04L25/02; H04L27/26; (IPC1-7): H04B7/06; H04B7/08; H04J11/00; H04J13/00; H04J15/00; H04K1/00
Domestic Patent References:
JP2003504939A2003-02-04
JP2002538661A2002-11-12
JP2002152191A2002-05-24
JP2000068975A2000-03-03
Foreign References:
US20030162519A12003-08-28
WO2003049322A12003-06-12
Attorney, Agent or Firm:
Koichi Washida



 
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