GPS系统小型化

　　GPS系统小型化

　　随着越来越多的设备成为移动设备，定位成为嵌入式设计的一个重要组成部分。将此功能添加到设备必须更小，更轻和更长的电池寿命是一个重大挑战。同时，实现高性能和低功耗的有效无线设计的挑战，同时满足项目时间表和认证机构的要求。

　　这些挑战正在解决的新一代无线模块，使用最新的小型化技术，利用各种全球定位系统（GPS）在世界各地，与GPS模块的足迹急剧下降，在过去的几年里。

　　GPS有几个品种，从美国的GPS，欧洲的伽利略，俄罗斯的GLONASS以及中国的北斗系统。现代无线芯片组从广泛的供应商提供访问所有这些卫星系统，并在硅制造技术的进步提供访问所有这些系统。

　　However， these devices still have to be integrated into a design and there are key components such as SAW filters that cannot be integrated into the silicon， and therefore provide a limit to the amount of miniaturization that is possible purely from silicon.

　　The integration of the silicon devices can help reduce the power consumption， although there are challenges of RF and digital integration that means the most advanced process technology is not appropriate. There are also issues of static current leakage that increase the power and the handling of noise in the system which can mean more power is required to get the required performance. Higher power consumption means more heat generated and larger batteries required; both of which limit the amount of miniaturization that is possible.