Introduction: When mobile phones have been adding digital camera functions, manufacturers are eager to open up new functional product lines to differentiate different product positioning and boost product competitiveness. In addition to mobile TV, audio and video phones and wireless Internet access are all so-called killer functions launched during this period. At the same time, mobile positioning services have also begun to take shape. For mobile phones, its biggest advantage is its great mobility. By using this feature, if we can use the mobile phone we carry with us to find out where we are at any time, and even navigate, the mobile phone industry is best at integrated design. Integrating the GPS module into the mobile phone will bring extremely convenient application advantages to the mobile phone. Picture: Mio A701 with integrated GPS navigation function. (Source: Mio) However, functional integration is always proportional to power consumption, especially the GPS module itself requires additional power consumption, which is a considerable difficulty for mobile phones that are extremely particular about standby and continuous use time. At present, almost all mobile phones with built-in GPS functions are smart phones. In general, the standby time cannot be compared with traditional closed-function mobile phones. After integrating the GPS function, it is almost impossible to achieve practical continuous use time. In solving this problem, the methods adopted are mostly to use larger capacity batteries, more efficient power management methods, and improve power consumption from the chip process. General GPS module architecture Generally, the GPS modules on the market can be roughly divided into three types according to their different architectures. From the aspects of technology and manufacturer products, they are introduced as follows: ■GPS independent chipset As the name suggests, the GPS designed in this way is built on an independent chipset...
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