鑽石機的內建GPS是用什麼晶片的啊?

請問一下~
HTC 鑽石機裡面內建的GPS接收晶片是什麼的呢?
規格理都沒有寫說...
是SiRF STAR 3嗎?
2008-05-30 23:54 發佈
wtomato123 wrote:
請問一下~HTC 鑽...(恕刪)


用的是 Qualcomm cpu 裡面內建的 gps ...
performance 跟 sirfIII 差不多... 有拼

qualcomm 的定位時間會比sirfIII 快一點
但SirfIII 的訊號會比qualcomm 穩一點
感謝~
我懂了
cpu裡面也可以內建GPS接收器的阿~好神奇
uncle_onion wrote:
但SirfIII 的訊號會比qualcomm 穩一點
...(恕刪)


應該是說:SirfIII 的訊號強但是會漂,可以看到導航軟體在路口轉來轉去
會不會飄移應該跟導航軟體比較有關, 和SirFIII晶片無關吧. 用Qualcomn CPU+embedded GPS solution應該是基於成本考量, 單純以GPS performance而言(不考慮耗電量及其他因素情況下), SirfIII應該比較優吧.
mustang168 wrote:
會不會飄移應該跟導航...(恕刪)


正相關喔......

不管哪一套軟體,你看Sirf III在定點的航跡是在一區域裡分佈,而不是很穩定
(他特性就是會抓反射波,所以訊號才會強,定位速度快)

不管小弟用哪套軟體搭Sirf III >> 都會漂,就算軟體減少精度,也還是會漂
改用MTK晶片,訊號強,定位時間差不多快,任何軟體都不會漂
MSM7200搭星曆資料,就算訊號不強,定位時間同樣小於30秒,定點一樣不會亂漂

衛星數量不多,不是重點;重點在於你定位能不能快,容不容易又失去定位
suaaa wrote:
正相關喔......

不管哪一套軟體,你看Sirf III在定點的航跡是在一區域裡分佈,而不是很穩定
(他特性就是會抓反射波,所以訊號才會強,定位速度快)

不管小弟用哪套軟體搭Sirf III >> 都會漂,就算軟體減少精度,也還是會漂
改用MTK晶片,訊號強,定位時間差不多快,任何軟體都不會漂
MSM7200搭星曆資料,就算訊號不強,定位時間同樣小於30秒,定點一樣不會亂漂
Yes, the chipset plays important role in here. But based on my experience and some scientific test done by www.gpspassion.com, Sirf III is much stable then MSM7200.
My SE X1 rom-> http://forum.xda-developers.com/forumdisplay.php?f=471
jackleung wrote:
Yes, the c...(恕刪)


that's what i said: qualcomm is faster than SirfIII
but SirfIII is more stable than qualcomm ( 比較不會飄)

and the website test result is base on device, not chipset ... antenna also plays an important role ...

so different device from same company with same chipset will also have different performance... btw, diamond is MSM 7201A not 7200 ...

uncle_onion wrote:
that's what i said: qualcomm is faster than SirfIII
but SirfIII is more stable than qualcomm ( 比較不會飄)
Yes. The testing supports your argument and give a counter example of what Suaaa claim qualcomm 不會亂漂.

Quote:
The Qualcomm based Samsung i780 and HTC TyTn II offer good results as long as the conditions are not extreme with a slight advantage for the TyTn II, but the SiRFstar3lt based Eten X600 remains the best performer, being able to handle all types of environments, including pedestrian use as seen in this comparison.

http://www.gpspassion.com/fr/articles.asp?id=175&page=8

And my personal experience in San Francisco where there are lots of high rise building proof it too.
My SE X1 rom-> http://forum.xda-developers.com/forumdisplay.php?f=471
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