Android GPS源代码分析

文章目录

• GPS简介
• 架构

GPS简介

GPS

• 2.046 MHz BW NB GPS (centered on 1575.42 MHz)
• Satellites transmit different codes at the same frequency (CDMA)

Glonass (GLO)

• ~8.3 MHz BW (1597–1606 MHz), 14 channels (-7 to +6)
• Satellites transmit the same code on different frequencies (FDMA)

BeiDou Systems (BDS)

• 4.092 MHz BW (1559.05 – 1563.14 MHz)
• Satellites transmit different codes at the same frequency (CDMA)

Galileo (GAL)

• 4.092 MHz BW (centered on 1575.42 MHz)
• Satellites transmit at the same frequency using Binary Offset Carrier (BOC) modulation (CDMA/BOC)

架构