GPS POSITION MEASUREMENT SYSTEM, MOVING STATION DEVICE FOR THE SYSTEM AND BASE STATION DEVICE

摘要

PURPOSE:To obtain a GPS position measurement system capable of reducing the hardware amount of the whole system and attaining cost reduction, a moving station device for this GPS position measurement system and a base station device for this GPS position measurement system. CONSTITUTION:A moving station for a GPS position measurement system has an antenna and a receiver to receive a GPS signal from a GPS satellite, a frequency conversion circuit 31 to convert the received GPS signal to IF zone signal, an A/D conversion circuit 32 to convert the converted IF signal to digital signal and a memory card writing device 33 or a wireless communication apparatus to process the converted digital signal for sending to a base station. The base station side is provided with a circuit to calculate the position of the moving station based on the digital signal sent from the moving station.