POSITION INFORMATION PROVIDING SYSTEM INDOOR TRANSMITTER AND METHOD FOR PROVIDING POSITION INFORMATION

摘要

PROVIDED IS A POSITION INFORMATION PROVIDING SYSTEM (10) WHICH CAN REDUCE A TIME REQUIRED FOR ACQUIRING POSITION INFORMATION. AN INDOOR TRANSMITTER (200-1) IS ADAPTED TO PROVIDE POSITION INFORMATION BY USING A SECOND POSITIONING SIGNAL COMPATIBLE WITH A FIRST POSITIONING SIGNAL WHICH IS A SPREAD SPECTRUM SIGNAL FROM EACH OF A PLURALITY OF SATELLITES. THE INDOOR TRANSMITTER (200-1) INCLUDES AN EEPROM (243) WHICH STORES THEREIN POSITION DATA FOR IDENTIFYING AN INSTALLATION LOCATION THEREOF, AN FPGA (245) OPERABLE TO GENERATE A SECOND POSITIONING SIGNAL INCLUDING THE POSITION DATA AS A SPREAD SPECTRUM SIGNAL, AND A TRANSMITTING SECTION (251 TO 258) OPERABLE TO TRANSMIT THE SPREAD SPECTRUM SIGNAL. THE SECOND POSITIONING SIGNAL IS GENERATED TO REPEAT THE SAME CONTENT IN A CYCLE SHORTER THAN THAT OF THE FIRST POSITIONING SIGNAL.