GPS系統(tǒng)小型化

　　GPS系統(tǒng)小型化

　　隨著越來(lái)越多的設(shè)備成為移動(dòng)設(shè)備，定位成為嵌入式設(shè)計(jì)的一個(gè)重要組成部分。將此功能添加到設(shè)備必須更小，更輕和更長(zhǎng)的電池壽命是一個(gè)重大挑戰(zhàn)。同時(shí)，實(shí)現(xiàn)高性能和低功耗的有效無(wú)線(xiàn)設(shè)計(jì)的挑戰(zhàn)，同時(shí)滿(mǎn)足項(xiàng)目時(shí)間表和認(rèn)證機(jī)構(gòu)的要求。

　　這些挑戰(zhàn)正在解決的新一代無(wú)線(xiàn)模塊，使用最新的小型化技術(shù)，利用各種全球定位系統(tǒng)（GPS）在世界各地，與GPS模塊的足跡急劇下降，在過(guò)去的幾年里。

　　GPS有幾個(gè)品種，從美國(guó)的GPS，歐洲的伽利略，俄羅斯的GLONASS以及中國(guó)的北斗系統(tǒng)。現(xiàn)代無(wú)線(xiàn)芯片組從廣泛的供應(yīng)商提供訪(fǎng)問(wèn)所有這些衛(wèi)星系統(tǒng)，并在硅制造技術(shù)的進(jìn)步提供訪(fǎng)問(wèn)所有這些系統(tǒng)。

　　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.