Gps performance (sirf 3 vs qualcomm)

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Hello,

I have a question. I read that in the diamond and the touch pro htc doesnt use the sirfstar 3 anymore but the qualcomm gps receiver.

The sirf 3 is a very good receiver but i dont have any experince with qualcomm. I read a review on the internet that qualcomm's performance is less effective than the sirf 3.

(http://www.gpspassion.com/fr/articles.asp?id=175&page=6)

Does anyone have any experience with the new qualcomm in htc's diamond or touch pro?

Look in the Diamond section, there's plenty of talk of issues with the GPS. No one has the Touch Pro yet since it hasn't released, so no one here could answer your question.

Originally Posted by Black93300ZX

Look in the Diamond section, there's plenty of talk of issues with the GPS. No one has the Touch Pro yet since it hasn't released, so no one here could answer your question.

But can't you summarize it??

So, I had Sirf Star 3, now I have Diamond (Qualcomm navigation). For a car use, Qualcomm performs as well as SirfStar 3, for pedestrian use, it is unusable, due to Static navigation can not be swithced. Diamond least for 2 hrs and 20 minutes of navigation, due to small batery, but like I said, for pedestrian it is unuseable, and in car you can recharge it permanently, so, iGO and TomTom works well. COM4 baud 4600.

Originally Posted by pokevitek

So, I had Sirf Star 3, now I have Diamond (Qualcomm navigation). For a car use, Qualcomm performs as well as SirfStar 3, for pedestrian use, it is unusable, due to Static navigation can not be swithced. Diamond least for 2 hrs and 20 minutes of navigation, due to small batery, but like I said, for pedestrian it is unuseable, and in car you can recharge it permanently, so, iGO and TomTom works well. COM4 baud 4600.

Is this a software or hardware limitation?

Originally Posted by pokevitek

for pedestrian use, it is unusable, due to Static navigation can not be swithced.

I have some difficulties to understand that. What is the point with "static navigation"?

First, someone thinks it is a software problem, someone thinks its hardware. Anyway, static navigation solves the probem with "jumping" GPS coordinates when staying on one place (in car, coordinates mey be +- 5 meters off), so, navigation will not actualise location in car if speed is under 3 km/s. That is it.

Ah okay, I understand.
But this "static navigation" should be handled by the application not by the GPS driver. So the navigation software can and should decide by itself if there is some advanced map-matching applied to the coordinates.
Is this "static navigation" feature only an issue with TomTom or does this apply to GoogleMaps as well?
As far as I can remember my old TomTom 6 application had a pedestrian mode as well. I would assume this "static navigation" feature would be turned off in this case.
Does TomTom 7 have no pedestrian mode or is this really something that is handled by the GPS driver?

Originally Posted by foo

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Is this "static navigation" feature only an issue with TomTom or does this apply to GoogleMaps as well?
...
Does TomTom 7 have no pedestrian mode or is this really something that is handled by the GPS driver?

I think you should ask this on the Diamond forum, because almost noone has this phone right now. But if you manage to get an answer, pls let me know, because I'm really interested in this question (I mean the 1st one).

Originally Posted by Barkeeper1979

Hello,

I have a question. I read that in the diamond and the touch pro htc doesnt use the sirfstar 3 anymore but the qualcomm gps receiver.

The sirf 3 is a very good receiver but i dont have any experince with qualcomm. I read a review on the internet that qualcomm's performance is less effective than the sirf 3.

(http://www.gpspassion.com/fr/articles.asp?id=175&page=6)

Does anyone have any experience with the new qualcomm in htc's diamond or touch pro?

Originally Posted by mydexterid

I think you should ask this on the Diamond forum, because almost noone has this phone right now. But if you manage to get an answer, pls let me know, because I'm really interested in this question (I mean the 1st one).

My experience with the Touch Diamond and iGO8 is that there is a time lag (when you stop the car the GPS continues moving 10 - 15 meters) and a lag consistently showing that my position is some 10 - 30 m behind the actual position. At least I have never seen iGO8 showing my position ahead of the actual. The latter becomes a problem when using smart or auto zoom when zoomed to the highest level. In that case it may look like i should turn at the next intersection and not the one I am in, and that is anoying. However, I believe its possible to set max zoom level also in the auto or smart mode somewhere, and that should improve matters (have not taken the time to do so).

However, the article you refer to does tell me that I'll have to live with some sort of issue, but by-and-large I find it is quite OK, especially if I zoom to a fixed level showing a little more than just 20 m road. I may add that iGO 8 in principle only runs on devices with SD support due to copy protection.