| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: indoor installation transmitter (200-1) is capable of providing position information using a second positioning signal which is compatible with the first positioning signal, which is a spread spectrum signal from each of a plurality of satellites. The indoor installation transmitter (200-1) has EEPROM (243) memory which stores position data for identification of the installation position thereof, FPGA (245) for generating a second signal, which includes position data in form of a spread spectrum signal and a transmitting unit (251-258) for transmitting a spread spectrum signal. The second positioning signal is generated to repeat the same content in a cycle which is shorter than for the first positioning signal.EFFECT: providing position information without deterioration of accuracy even in a position where it is impossible to receive radio waves from a satellite which emits positioning signals, and shorter time required to obtain position information.10 cl, 26 dwg |
