GPS signal unstable

Similar Questions

• Acquisition with USRP 2953R of the GPS signal

  Hi all

  How can I configure a 2953R USRP receive GPS signals? I have an antenna VERT900 connected to the GPS ANT of the USRP port, but in the example VI 'niUSRP EX Rx with GPS', I can't reference this port in the field 'Active antenna'. I put only things like TX/RX or RX1 etc. Should what values I put in other areas as well? I know that the L1 band is 1575,42 MHz.

  

  Hello

  The example you posted shows you how to acquire an RF signal on the ports of the USRP with internal clock RF and sources of reference defined in the GPS.

  To make it work properly, you must have a GPS antenna connected to the Terminal on the GPS device and installed in a place that receives a good level of GPS signal.

  The other control of antenna on the schema defines the port on which to receive the RF signal.

  If you want to capture and analyze the signal GPS (RF) itself, you can tune into the front-end RF (carrier frequency) at the right frequency of GPS band and connect your GPS antenna to the RF port.

  You can use the simple niUSRP EX Rx continuous Async.vi in this case (but may not work due to the very low consumption of GPS RF signal)

• Problems with GPS signal/slot

  Hello

  I try to get GPS information for my application. I did a class to do so.

  #ifndef GPSHANDLER_H_
  #define GPSHANDLER_H_
  
  #include 
  
  #include 
  
  #include 
  #include 
  #include 
  
  using namespace QtMobilitySubset;
  
  class GPShandler : public QObject{
      Q_OBJECT
  public:
      GPShandler(QObject* parent);
      virtual ~GPShandler();
  private Q_SLOTS:
      void positionUpdatedSlot(const QGeoPositionInfo &geoInfo);
  
  public:
      void start();
  
      void stop();
  
      double Latitude();
  
      double Longitude();
  
  private:
      double mGeoInfoLat;
      double mGeoInfoLong;
      QGeoPositionInfoSource *mGeo;
  };
  #endif /* GPSHANDLER_H_ */
  

  #include "GPShandler.h"
  
  GPShandler::GPShandler(QObject* parent)
  : QObject(parent) {
      mGeoInfoLat = 0;
      mGeoInfoLong = 0;
      mGeo = QGeoPositionInfoSource::createDefaultSource(this);
      if (mGeo) {
          bool checkval = connect(mGeo, SIGNAL(positionUpdated(const QGeoPositionInfo &)), this,
                  SLOT(positionUpdatedSlot(const QGeoPositionInfo &)));
  
          mGeo->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
          mGeo->setUpdateInterval(1000);
  
          //checkval = mGeo->setProperty("backgroundMode", true);
          //int i = 3;
      }
  }
  
  GPShandler::~GPShandler() {
      // TODO Auto-generated destructor stub
  }
  
  void GPShandler::positionUpdatedSlot(const QGeoPositionInfo &geoInfo) {
      // Here's where you can do something with the device's position
      mGeoInfoLat = geoInfo.coordinate().latitude();
      mGeoInfoLong = geoInfo.coordinate().longitude();
  }
  
  void GPShandler::start()
  {
      mGeo->startUpdates();
  }
  
  void GPShandler::stop()
  {
      mGeo->stopUpdates();
  }
  
  double GPShandler::Latitude()
  {
      return mGeoInfoLat;
  }
  
  double GPShandler::Longitude()
  {
      return mGeoInfoLong;
  }
  

  As you can see I have connected the signal postionUpdate() of QGeo class that I use for the positionUpdatedSlot() of the slot. I use the class as follows:

  Pop = new GPShandler (this);

  void::startTimer() {} App

  Pop-> start();

  }
  void::stopTimer() {} App

  Pop-> stop();

  }

  which are called when a key is pressed. However, the positionUpdatedSlot() of slot function is never called. I have debugged in my code and cannot find the problem. I can confirm the work of connection (function returns true), and that presented startup and shutdown functions are called as expected. Is there a reason why my slot machine function is not called?

  Note: I have another implementation of signal/slot in this app:

  Connect (mTimer, SIGNAL (timeout ()), this, SLOT (update ()));

  and it works very well.

  Thank you

  Gerry

  I do not know which of the following has solved my problem, but in any case, it's working now after doing these things:

  1. give permission to app to device identification information. (I had already given GPS, but examples also being device identifying information I thought I'd try that)

  2. remove the line:

         mGeo>setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
  

  as an example, I created using this example: http://blackberry.github.com/Cascades-Samples/geo-locationdiagnostics.html did not have this line

• Smartphones from blackBerry Curve 8520 - Blackberry MAPS - how/where can I configure the GPS signal?

  I took a brief look at the questions on the CARDS, but none of these go to the ART GPS end does not. (I'm sure it's somewhere in the support forums, but I found nto).

  I have the icon of the WAP on my Blackberry Curve 8520. But when I click it I don't see is a grid nd no card. I checked Options Options/Advanced/cards and it is said by default Blackberry MAPS Service - EU. I also checked the place settings and under GPS Data Source it comes up with a list of all my contacts id bluetooth I suspect this is where it goes wrong, but I can't be sure.

  How can I put the correct GPS data source. How/where can I set this up please. ???

  Thank you

  JJ

  Any other ideas as to why the Blackberry connects sometimes to devices and sometimes does not. I saw him sign for a brief moment especially for my GPS dongle. Then fell to new. The signal on the dongle seems it continues to blink.

  When I take my BB in my car it instantly takes the car blue tooth

  Don't understand why he doesn't connect properly on my GPS unit now.

• Smartphone blackBerry pearl 8130 for telus not finding gps signal

  I can't have the gps to work on blackberry maps.  I can get a satellite signal using the test program free telus navigator.  I'm womdering if telus makes the blackberry maps not to pick up the satellite signal in the cards blackberrry free so u pay the extra money to use the router to telus telus adavertises the Pearl has an internal receiver that works with the blackberry browser).  I would really like to use blackberry maps with gps work - can someone help me with this.

  One thing that I tried that seems to work at least occasionally time to erase the memory of the device before you open maps of BB.  It seems to work I think maybe the international program out of the internal memory until u clean the memory.  You can do this by going to options-security-clear memory.  You can also put an icon to empty the memory on your screen.  Give it a try and see if I work for you.  Kevin Miehm

• B1-820 Iconia has GPS issues. No application gets a GPS signal.

  Is there any help to solve the promblem? The GPS function is the one that I need this device. Thank you.

  This is the standard application to test the GPS.

  https://play.Google.com/store/apps/details?ID=com.chartcross.GPSTEST

  There is an option on this app 'clear data AGPS', I suggest to delete it and then update the AGPS data, a data connection is required to do.

  then try to have a fixed point, GPS, stay outside, the first time probably you will need 5 minutes to have a basic solution.

• GPS "Signal search"

  Hello...

  I have had the DROID for about 3 months. About 5 weeks, the GPS began to stop randomly. No matter what application I am trying to use will not locate me - even a simple compass. I know other people with this phone and none of the questions. I've seen a few other discussions about this, but none really past the reset (as you can see below, I went).

  Try 1 - Phone - has come a troubleshooting, which ended in a recommendation to the battery on the phone to reset it. As I was on the phone, he had to wait... I did, and the GPS worked immediately.

  Try 2 - Store - representing battery out and of course, began to work again.

  Try 3 - Phone - representative said that there is no trace of this problem for my phone model, yet once ended with the recommendation to remove the battery.

  Try 4 - store - representative said that the setting "Use wireless networks" must NOT be checked, because interfering with the GPS (total bunk, but hey, I'll try anything).

  Try 5 - store - representative said that a factory reset would solve all the problems.  Not only did cause my phone to stop randomly over the next few days, but GPS still not yet (but the random shutdown problem was fixed when I took not so well placed battery and succeeded him safely).

  Try 6 - store - Advisor said that I probably have an application that "embarrassment" the capabilities of the phone GPS and recommended I have uninstall one by one to see which is malicious.  Just to be clear, this is a COMPLETE list of the applications on my phone right now: Advanced Task Killer, c: GEO, compass, GeoPointer, Pandora, and Radar.  I looked through the comments for these applications, there is announcement of the GPS issues.

  I certainly uninstalls, but what I need is a suggestion on what to do tomorrow, when it will probably happen again. All suggestions are welcome!

  Thank you

  Sarah

  Sarah, if you made a data factory reset and did not add any other third party apps before you test your phone after the FDR and you still have the anomaly, there is a problem with your droid.  -Dan

• Wrong time current GPS receiver while generating signal GPS with GNSS Toolkit

  Hi all!

  I have a problem with the generation of GPS signal. As he has shown in the current schedule to the receiver time differs from time current GPS week on niGPS Live Streaming Generation.vi

  Time initial GPS set to 0, so I expect the current, while production should start at 0:00 December 6, 2015. But the receiver poster 23:59:40 12.06.2015 start

  Could someone explain to me what can be wrong?

  That's what I was talking about yesterday.

  Time of receiver watch hour UTC

  Is time on GPS Live Streaming VI GPS.

  GPS Time - time UTC = 16 seconds (Leap).

• Unstable GPS on ACER Liquid Jade S [icoyote]

  Hello

  I recently bought an ACER Liquid Jade S. I use it with two sim cards.

  The problem is that the GPS seems to be very laggy. When you use the sailing of Acer, the phone seems to lose its position some time. The position is really not accurate at all.

  However, the icoyote application is not usable at all. Speed acknowledged is not accurate at all.  And the signal is lost at high speed.

  Can someone help me with this matter? Is there a solution to my problem?

  Thank you

  OK, just tested and...

  (1) acer Nav worked smoothly, no problems even at 130 km/h

  (2) Google navigator worked smoothly, no problems even at 130 km/h

  (3) icoyote... the worst app I've tried. he loses parts of language, false warnings and GPS works at random, but it's an application error, given that the coverage was good.

  Note that I had no GPS signal map icoyote but clicking on the GPS icon and check signal on icoyote, GPS has 4-6 satellite and the speed has been recognized, go to the main screen, no speed and no signal.

  so, in the end, your device probably has some questions about GPS but icoyote done even worse.

• My 7 GPS iPhone does not work in any GPS application

  I got my new iPhone 7 last week. Yeaterday was the first day I tried to use Waze to give me directions to an address, but he was constantly telling me that she is looking for the GPS signal.

  I first thought that it is a problem with Waze so I reinstalled, displayed/hidden it's approval of location on and outside Services, but nothing helped. I restarted the phone, even restored (Yes. I have about 2 hours waiting to do).

  But that has not worked so I thought that perhaps Waze is, after all the blame. So I tried also maps from Apple and Google Maps. NONE of them could get my location. And while my position was 'fixed' at Waze, showing me home - Yes, Waze is still showing me the House status even if I am in another city - maps of Apple and Google Maps shows my post to jump around randomly on the map.

  I tried to reset my edge settings, my privacy settings, each of them. Nothing helps.

  Is there perhaps someone who has a solution, or should I go through the pain and try to replace a week later I got it?

  Hi zeusent,

  Congratulations on your new iPhone 7! I understand that you have some problems with it to find your location to several applications. I know it's important to be able to find your way when in a new area, so I'm happy to help you.

  Before you begin, make sure that you have a current backup of your data:

  The backup of your iPhone, iPad and iPod touch - Apple Support

  You've already got a good start with the troubleshooting you have been through. Since you still have questions, it can help to determine whether it is material or not by restoring the iPhone as new. This article has the steps to do:

  How to clear your iOS device and then set up as a new device or restore from backups - Apple Support

  Thank you for using communities Support from Apple. See you soon!

• Error of GPS in the iphone 6 more after upgrading to ios 10

  After updating my iphone 6 more iOS 10, the gps signal was missing, when I try to disable and enable the iphone you location is bloked, before the update that the gps is working properly. Can correct this feature in relese next IOS? Thank you very much

  Hi Chicojander,

  I understand that you have difficulties using your GPS on your iPhone. I know it's important to be able to easily know where you are located, so I'm happy to help you.

  Looks like you've already got a good start on your troubleshooting of switching location Services. On top of that, look at the troubleshooting we offer here:

  Get help with maps - Apple Support
  

  If you do not find your current location on your iPhone, iPad or iPod touch

  1. Go to settings > privacy > location Services and to make, of course, this location Services and maps is set while it helps.
  2. Make sure that you set the date, time and timezone correctly on your device. Go to settings > general > Date & time. If possible, use the value automatically.
  3. Restart your device.
  4. Make sure that the cellular data or Wi - Fi turned on and that you have a connection active.
  5. Try another location or switch to another Wi - Fi network.

  Location-based services using GPS, Bluetooth, crowd-sourced hotspot Wi - Fi and the cell towers to determine your position. Learn more about The location Services on your iOS device.

  Thank you for using communities Support from Apple. See you soon!

• drops of 128 GB - iPhone GPS 7 and no service error

  I have the iPhone 7 128 GB on Verizon network with big issues, especially when I run my GPS.  It is down to no service in areas that I know I have a full 4 g LTE bars and drop the GPS signal.   When I run my GPS (tried Waze/Google/Apple) it will go down to about 3 to 5 minutes at a time... a big problem when traveling in areas you are not familiar with.  When he returns, it will often get stuck on 3G, again in the areas that I know are well covered in the 4G LTE.  I tried to reset network connections already several times and rebooted.  Lets hope that this problem is corrected.  I'm in iOS 10.0.1

  Hi toebone7,

  I understand that you regularly lose cell phones and GPS signal for several minutes at a time. I know it's important to have a good connection, if available, so I'm happy to help you.

  Your troubleshooting is off to an excellent start to restart the iPhone and reset the network settings. Primarily by continuing further, I would recommend backing up your iPhone:
  The backup of your iPhone, iPad and iPod touch - Apple Support

  Once you have a backup, I recommend you to reset all the settings on your iPhone. This will not erase all content, but it can reset it your Wi - Fi settings, access code and background image. To do this, go to settings > general > reset > reset all settings. Once it is done by restarting, reconfigure your settings and try again.

  If you continue to have problems, you can restore your iPhone as new and test it without a backup to refine the cause:
  How to clear your iOS device and then set up as a new device or restore from backups - Apple Support

  Thank you for using communities Support from Apple. See you soon!

• GPS works not properly

  I use my Iphone 6 more and when I upgraded my IOS to 9.3.5 I can't properly use my GPS on google maps and waze. Can I ask someone to help me with that.  Thank you

  Hi, jmd718!

  Thank you for using communities Support from Apple. After reading your post, I understand that you have problems with your location service, including in Google Maps and an app called Waze. Not being is not the best with directions, I rely on my location Services everyday so I definitely want to make sure that yours work as expected!

  I would recommend going through the article, specifically the "Improve GPS accuracy" section, in order to ensure that you get the best location-based Services and GPS signals available.

  On the protection of personal information and location Services

  See you soon!

• Issue of GPS IOS 9.2.1

  Since I have updated to IOS 9.2.1 each application GPS that I use can't find my position.  I tried Google Maps, Maps, and Waze.  All three are unable to locate me.  I thought maybe it was due to the weather we had a snowstorm, but the snow has melted (most of it) and I still can't get a GPS signal.  It's very frustrating.  I tried a hard reset (hold down the power button / stop and the "home" button).  I tried to go in and turning the location off and turn it back on.  I reset my phone to factory settings. Who has not solved my problem of GPS.   Someone else has the same problem.  Either way, I have an IPhone 6 more.

  Yes, I'm having the same problem. It's really frustrating when I rely on my browsing to work.

  Hoping someone has a solution! And I have just the 6

• binary data from GPS VI-example RF recording / reading with NI USRP

  Hello

  In the demo video (http://www.ni.com/white-paper/13881/en) a ublox was used to record the GPS signal while driving. How is it possible to record with you - Center in a binary data format which is usable within LabView for the reading of the GPS signal? Ublox uses the *.ubx data format, is there a converter?

  Hello YYYs,

  The file was generated not by uBlox but by recording and playback VI.  An active GPS antenna, fueled by some amplifiers and mini-circuits was related to the USRP and the program created LabVIEW file (USRP being used as a receiver)

  Later the USRP is reading the file (generation) and the Ublox GPS receiver is to be fooled into thinking that its location is currently somewhere else.