Hi,
does anybody has an overview of the location of the several hardwarecomponents? Especially the GPS Chip and Antenna?
I replaced my Display and since that time I have big troubles getting a GPS fix, I can't see any loose connections, maybe knowing where the GPS Chip is can help me here.
Thanks
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Isn't GPS by definition line of sight. i.e. your phone needs view of the sky to get a a gps signal or satellite lock.
I have seen multiple posters saying that they are in their house or office building and not getting a lock or signal. Unless you are by the window or skylight, you shouldn't be able to get a signal by GPS alone. The only location information would be gotten from the network.
If people are having trouble getting location lock 'inside', doesn't that mean that there is a location problem in general, not just a gps issue?
I am definitely a noob, but I have been using GPS since the technology came out and my general understanding is that without a view of the sky, you will not get a signal. Or am I missing something?
Its radio based not light based so it will go through some materials. For example, I get sat lock in my second floor but I cannot see any sats downstairs.
Sorry, nope!
See this link:
electronics.howstuffworks.com/gadgets/travel/gps.htm[/url]
In the second paragraph it states that you need a CLEAR view of the sky.
On this link it explains it even further stating that NO GPS reciever is designed to work indoors.
gpsinformation.net/multipath.htm[/url]
Further, satellite TV isn't light based. But it still needs to be outside so that it can get reception from it's satellite. So your statement about it being radio based rather than light based does not answer the question.
Anyone else?
I'm not a GPS expert but I used to get a lock anywhere with my G1. W/O using network so yeah, this GPS officially sucks.
XDA Mobile
MonteCristo22 said:
Isn't GPS by definition line of sight. i.e. your phone needs view of the sky to get a a gps signal or satellite lock.
I have seen multiple posters saying that they are in their house or office building and not getting a lock or signal. Unless you are by the window or skylight, you shouldn't be able to get a signal by GPS alone. The only location information would be gotten from the network.
If people are having trouble getting location lock 'inside', doesn't that mean that there is a location problem in general, not just a gps issue?
I am definitely a noob, but I have been using GPS since the technology came out and my general understanding is that without a view of the sky, you will not get a signal. Or am I missing something?
Click to expand...
Click to collapse
Certain radio frequencies, including those used by the GPS satellites, are considered line of sight. That is to say, to get a good signal you need to have a clear path to the transmitter. Some radio frequencies actually bounce of a layer of the earth's atmosphere and can travel around the world, and are therefore not line of sight.
If a receiver is sensitive enough and a signal is powerful enough (and depending on the frequency), a signal can still penetrate some degree of cover, so it's possible to get a GPS signal indoors, but as you mentioned, it's usually when one is close to a window. Some GPS receivers are terrible unless you're well out into the open, some can pick up a signal under tree cover.
GPS satellites are something like 12,000 miles above the earth, so by the time a signal gets down to earth it's not all that powerful. Radio power dissipates over distance just like any other form of energy.
You will get the best signal with a clear sky view, but basically modern GPS receivers are now also able to work off reflected signals, as well as the very faint signals which may leak through building walls and so on. A relatively high number of signal errors just translates into reduced accuracy.
Furthermore, satellite-based GPS can be "enhanced" through short-term inertial tracking. Most in-dash nav systems do this (my Suburban will sometimes show a "GPS" icon with a slash through it, and then it relies on inertial nav until it gets a signal again). Your phone can do similar things with the tower signals and perhaps even WiFi SSIDs to help your sat-GPS cope with suboptimal conditions (and it ought to be able to use inertial nav via the accelerometers, but I don't know whether it actually does this).
If you want very high-res GPS, you still have to be outside with one of those backpack-mounted rigs. (A friend of mine does GIS and surveying, and under the right conditions they can get centimeter resolution with those.)
Satellite TV isn't a good comparison for many reasons. First of all, an audio/video stream is a gigantic amount of data compared to the relatively simple timestamped pings that GPS satellites emit. Second, there isn't any demand for electronics manufacturers to provide hyper-sensitive reception: mounting antennas on a roof or exterior wall (or in the case of something like XM, on top of your car) is fine with most people.
Hey guys. Coming from 3 HTC Android phones, I never had any problems regarding fast locking and accuracy on my GPS, may it be indoors or outdoors.
With my SGS2, I wasn't really happy with its GPS performance.
Aside from very slow GPS fixing / locking in satellites outdoors (tested with GPS Status app), I get a very jumpy GPS location indoors. Even with downloaded AGPS prior to that.
I created a screen cast of my Google Maps app below for reference. The star on the map is my actual location. Notice how my location jumps from one place to another every few seconds.
Even turning on the sensor aiding made no difference.
Video
I know some of you might say that of course checking it indoors and relying on wifi alone will make it inaccurate. But even my iPod Touch which doesn't even have a GPS chip have no issues locating me.
I'm running Cognition 1.15 and flashing a stock ROM and kernel also made no difference.
Can you guys test yours with my setup: Only Wifi indoors and do not get gps lock outdoors.
I will do further testing.
Welcome to the club m8. http://forum.xda-developers.com/showthread.php?t=1173683
I think it's jumpy because it's not using gps, but fixating you postilion from you network and wifi. That's why it jumps.
Does your gps show lock at the top icons bar? Or does it just keeps flashing?
Mines going back for sensation or lg.
Hi. My GPS icon is flashing. Yep, I'm aware that it is till looking for a satellite to lock in. Which is a problem in itself by the way ^_^
My point here is that I've done this similarly on my previous phones and with my iPod Touch, same setup. But they didn't produce this problem.
UPDATE: Tested out the GPS outside. It won't lock to any satellite (after like 10mins) unless I turned on WiFi. GPS should work independently, right?
Once I had it locked to 6 satellites at max, I went indoors and same thing happened to the screnario on the video, my location jumps from one place to another. Shouldn't it take the previously GPS locked satellite as reference?
chobie said:
UPDATE: Tested out the GPS outside. It won't lock to any satellite (after like 10mins) unless I turned on WiFi. GPS should work independently, right?
Once I had it locked to 6 satellites at max, I went indoors and same thing happened to the screnario on the video, my location jumps from one place to another. Shouldn't it take the previously GPS locked satellite as reference?
Click to expand...
Click to collapse
It is using the satellite position from last lock to help getting a new lock, but it still needs to have stable reception from 3 satellites in different parts of the sky for a certain time in order to lock, it probably doesn't get this indoors.
But you seem to have some problem getting a lock with your GPS, some people are helped by doing a factory restore when they're having such issues. (beware, wipes your data!!!)
What do you mean by turning on Wifi by the way? Do you mean turning on "Use wireless networks" in Location and security menu? This is not something wifi specific, in fact since you're outdoors it normally uses your 3g connection to get approximate satellite positions and your approximate position from network operator. So please doesn't call this turning on "Wifi", because that means turning on/off you wifi receiver, that is another setting
EDIT: added "in different parts of the sky" above, 3 satellites close to each other is usually not enough for a GPS lock.
tjtj4444 said:
It is using the satellite position from last lock to help getting a new lock, but it still needs to have stable reception from 3 satellites in different parts of the sky for a certain time in order to lock, it probably doesn't get this indoors.
But you seem to have some problem getting a lock with your GPS, some people are helped by doing a factory restore when they're having such issues. (beware, wipes your data!!!)
What do you mean by turning on Wifi by the way? Do you mean turning on "Use wireless networks" in Location and security menu? This is not something wifi specific, in fact since you're outdoors it normally uses your 3g connection to get approximate satellite positions and your approximate position from network operator. So please doesn't call this turning on "Wifi", because that means turning on/off you wifi receiver, that is another setting
EDIT: added "in different parts of the sky" above, 3 satellites close to each other is usually not enough for a GPS lock.
Click to expand...
Click to collapse
I totally understand that. I referred to Wifi because it's the only connection I was connected to in asstistance to my GPS. My mobile data is turned off. But I did test it by isolating only mobile data on to check if AGPS by 3g will get me faster lock on it -- No difference.
I have also flashed a stock ROM and Kernel and fully wiped my phone data but it is just producing the same problem.
To be honest m8 this phone is good on the spec, and looks good too. But poor internal hardware lets it down. I went down to my local shop to see if it was me or something and asked for a demo test for phone they had and they also couldn't get it to lock the gps on it's own.
I feel for andriod, it can give it a bad name. But it's not androids fault it's Samsung, if your phone is new replace it with sensation or lg 3d.
I've even had the opportunity, to try it with CM7 now, so it seems it hardware afterall.
Guys chill down ur balls, gps readings r very subjective and u cant judge on them
http://forum.xda-developers.com/showthread.php?t=1126122
Still really disappointed that my iPod touch can get a very accurate gps fix in less than five seconds considering it has no GPS chip and only using wifi. This has aGPS and sensor aiding and yet it's not very accurate and is jumpy still.
Hello, I was using GPS a lot during summer on official ROM, but after summer, when I stopped using it, I've managed to switch to custom ROM. I wasn't using GPS, so I didn't know that it isn't working. Now, I tried many ROMs, including the official one flashed via KDZ. Nothing is working, so what should I do? I have fast fix, but when I start moving, even if it is 2-3meters the GPS goes nuts and lose the signal:crying:. Any advice please?
I had this. Unfortunately, was not software related in my case (although I also flashed a lot of ROMs). The sat fix was fast, but very unstable in movement, rendering navigation software useless.
Turned out the culprit was bad contact between GPS antenna and the mainboard.
The workaround: removing the battery cover, apply pressure over the GPS antenna (like trying reseat it). I made it several times, but if you try this (at least, you will see if your issue is the same as mine), please be VERY careful, or you will end up with a broken screen glass, or mainboard.
The stability improved 90%, but the precision is not the same as new (but I can use Google Navigation and tomtom again).
I downloaded the service manual, the correct is disassembly the unit and check the contacts, but I don't have that tiny philips screwdriver. Time to leave the unit in a Service Center, and get the contacts cleaned/checked.
PS: The GPS unit in this litle beast is very sensitive, but LG's quality control in assembly probably is to blame.
Thank you, I will try it when I will have a chance .
EDIT: Didn't worked, I will try it again tommorow... or send it to the service
Molitann said:
Thank you, I will try it when I will have a chance .
EDIT: I think that I overpressed it, because it can't find any satelites and when I start any app that is using GPS, the gps icon doesn't appear... I'm so stupid . So, only chance now is to buy a new antena or go to the service.
Click to expand...
Click to collapse
My god! Sorry about that...
But are you sure the gps hardware is activated (in Settings?).
In software (ex: GPS Test), status is showing "No GPS"?
I've just edited my post, it's ROM issue (stock ROM shows the icon and about 5 satellites, but the CM doesn't show the icon and I can't get any satellite), the gps still sucks
Hi all.
After a battery mod(I adapted a s7 battery instead of the original)i no more have satellites view in gps status apps. Strange thing is that nav apps seems to fix signal but it's only net localization,unuseful to navigate. The gps hardware seems to be detected by the system so I think it coud be antenna problem. I already tried all fixing apps and to disassemble partially the logic board but I really don't understand where connectors and antenna gps are inside. Some helps please? Thanks in advance:good:
Help needed to fix poor WiFi and Bluetooth range.
Hello. I'm a mido user. My Redmi note 4 got dropped from my hand and the display got crack and my 4G ic chip got damaged too. I gave to a local store . They changed the display and changed the 4G ic chip also. It got fixed finely. But now I'm having a new problem after changing the display , that is my wifi and Bluetooth signal range has got reduced, usually Redmi note 4 wifi and Bluetooth range is up to 10 meters. But now I am having range of 1 meter only both in wifi and Bluetooth, I tried changing to custom ROM, resetting wifi and such software stuffs. But nothing worth. I have come to pick a decision that this problem is from hardware side maybe. Maybe the WiFi & Bluetooth combined antenna has got affected by them. Can anybody help me to figure out the real problem and a descriptive solution for this!?
Thanks in advance to all who will reply to me.
From the description of your problem, it is certain that there is indeed a hardware damage. Maybe when your phone is being repaired they don't install it properly / use a part that is already damaged or doesn't fit, maybe you should visit the place where you service your phone.