DEVICE FOR TRANSMITTING POSITIONING SIGNAL, POSITIONING SYSTEM EQUIPPED WITH SUCH DEVICE, AND SYSTEM FOR TRANSMITTING POSITIONING SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide a device for transmitting a signal that enhances positional information calculation accuracy.;SOLUTION: This transmitting device 200 for transmitting a signal for positioning includes: a crystal oscillator (OCXO) 210 with a constant temperature vessel that oscillates so as to minimize a change in its output frequency owing to a change in ambient temperature while keeping a crystal vibrator at a constant temperature by means of the temperature bath; a voltage controlled oscillator (VCO) 220 for outputting a carrier wave modulated according to a signal from the OCXO 210; multipliers 240 and 260; a code generator 230 for outputting a code pattern to the multiplier 240 in order to determine an artificial satellite mounted with the transmitting device 200; a memory 250 for storing therein a navigational message; an up-converter 270; a transmission part 280; and an antenna 290.;COPYRIGHT: (C)2007,JPO&INPIT