手持GPS设备设计技巧白皮书

scott_club

This is a "手持GPS设备设计技巧白皮书". Friends, do you want it ? Just spend a RD, Maybe it is worthy of you to spend a such cheap RD.
【文件名】:0873@52RD_手持GPS设备设计技巧白皮书.pdf
【格　式】:pdf
【大　小】:221K
【简　介】:GPS Design Issues in handheld devices - Whitepaper
Abstract
This document discusses common GPS
implementation problems in portable
devices. Typically the performance of GPS
is highly reduced in PND, PDA, Feature
Phone and Smart Phone devices due to
lack of understanding of basic HW/RF
design and EMI issues.
The root cause arises typically from both
poor antenna design/selection and internal
EMI interference.
GPS signal power level in open sky
environment is nominally –125dBm. This
is equivalent to the power level of a 60W
light bulb lit in Japan and observed in
Finland (if you could see it). The GPS
signal level is also about 160dB lower than
a GSM transmitter transmitting at 1W
(+30dBm). We are talking about a very
weak signal that leaves very little room for
receiver design errors…
【目　录】:

wangkelili

楼主，为什么打开以后提示文本损坏，打不开啊。能否给我发一份，我的邮箱Simon.wang9@byd.com

wlbj

可以打开，谢谢

lighterx

hao shu, no money