GPS receiver chipsets?

O

OmegaA

Joined
Feb 13, 2004
Messages
282
I am selecting GPS receiver for my mobile (Nokia N70). As I understand, one of the main differences that makes a GPS receiver bad or good is the chipset (mapping software is not an issue for me because I can find it). Could you tell me what kind of chipsets (NemeriX NJ-1030, SiRFstarIII etc) are available on the market and what are their advantages and disadvantages? If you know some websites that gives good and short explanation on chipsets, could you paste it here?
Thanks,
 
If you want to talk to people that eat and drink GPS get on GeoCaching .com.
What are your plans for using the GPS for??? If its for streets then all of them would work about same for you. If its for hiking and backpacking or GeoCaching then the SiRF is one of the better ones today. It offer better reception under tree cover and in canyons.

Sasha
 
As I understand, many mobile phones don't really use a GPS chip at all. Instead they use signal strength to nearby cells to triangulate current positon. Also, Ive read that lots of cell sites do not support GPS positioning at this time.
 
iDEN only handsets (Nextel) have a fully autonomous GPS chipset that will work outside thier footprint. You can buy Trimble Outdoors (java app) for that device and it will work like a basic GPS unit. Some CDMA handsets are starting to get fully autonomous chipsets, but I would NOT go there yet.

If your Nokia is Bluetooth you can Google and buy a Bluetooth GPS reciever - just make sure it does not have a subsidy lock for a particular application. AT&T (Cingular) sells one without a subsidy lock for about $100. There are only a couple of chipset manufactures and they supply for almost all the devices out there.
 
Thanks for replies.
My main use will be traveling on a car/walking in cities though I intent to use it for hiking as well, not only in Europe but also other continents.
Thanks,
 
Quiet Bear said:
iDEN only handsets (Nextel) have a fully autonomous GPS chipset that will work outside thier footprint. You can buy Trimble Outdoors (java app) for that device and it will work like a basic GPS unit. Some CDMA handsets are starting to get fully autonomous chipsets, but I would NOT go there yet.
Click to expand...

Perchance you have dealings with Sprint? There are a lot of autonomous GPS CDMA devices in the works. The only thing is, certain apps require connectivity to the network to display your maps and info.

Some of these new devices have a GPS RX sensitivity of up to -159 dbm so you can use them indoors. (For the techie folks.)
 
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