Tony Murfin The ION GNSS+ 2015 Conference once again fielded a jam-packed agenda of papers on subjects from world-wide constellation updates, through GNSS integrity, indoor navigation demonstrations, multi-constellation/function chipsets, interference mitigation and jamming detection, privacy issues, and many other very interesting subjects. That’s GNSS+ in the conference name, as in “plus,” denoting the many other positioning, navigation, and timing technologies it covers. Most papers contained advanced academic research, but there were also several new industrial releases. This year ION divided and clearly differentiated sessions between “System and Application Tracks,” that is, those with more direct industry content, and “Peer-Reviewed Tracks,” the so-called “pure” research. As always, some of the most valuable takeaways of attending ION come from the numerous unrelated, off-the-record corridor conversations: an essential element, always spontaneous and much anticipated, but something that cannot be clearly identified nor put into the program. The conference seemed to have around the same number attendees as last year with about the same number of exhibitors, even though a few of the big booths were missing. Paradoxically, some exhibitors privately said they did better and more business this year, even with fewer attendees, according to their estimates. SPIRIT Navigation from Moscow did not have a booth, but Ruslan Budnik made sure to fill my notepad with lots about their technology, products and initiatives. They are among several companies working to add indoor navigation capability to smartphones, using existing onboard sensors and new intelligent software. Their solution concurrently uses multiple technologies including geomagnetic fingerprinting, pedestrian dead reckoning, and map matching, but does not rely on an installed beacon infrastructure. A Spirit app allows store operators to quickly map Wi-Fi and Bluetooth signals and collect a Magnetic field map which matches the floor plan of the store’s venue. Spirit claims an accuracy of around 1 meter, which Ruslan proceeded to demonstrate to me in the corridors around the ION meeting rooms. The plenary session on Tuesday night was very interesting with a presentation on the results of NASA’s planetary exploration over the last several decades, by Dr. James Green, NASA Director or Planetary Science. I learned a lot about our solar system; much more out there than one suspects, and much to be revealed in the next few years! GPS World editor Alan Cameron once again led a preview of the planned sessions for the week, with each session chair constrained to a 5-minute rapid-fire presentation aimed at enticing as many attendees as possible. Interesting and somewhat humorous at the same time; we still got a flavor of what was to come in each track. On Wednesday I was fortunate to be able to interview several show exhibitors. Some of these you will also find in video footage on the magazine’s website, speaking to you straight from the show floor. Skydel is a relatively new exhibitor, working with Averna, both from Montreal, Canada. Averna makes signal analysis hardware on which Skydel installs software-based simulation of GNSS signals. Skydel’s objective is to be able to make their solution so affordable that every engineer could have one of these record and playback simulators on their desk, rather than having to schedule time on a central, shared multi-function simulator. An exciting new-entry product developed by an energetic group of people with a high level of ingenuity; hopefully they will succeed. DLR antenna prototypes A robust receiver initiative from Deutsche Zentrum für Luft- und Raumfahrt (DLR), the German Aerospace Center, aims to demonstrate that jamming and interference detection and mitigation can be achieved much more effectively than just at the RF level. Their processing goes deeper with such features as knowing that a source from a particular direction isn’t aligned with the current constellation, so it’s a jamming/interference suspect. Their conformal antenna development attempts to meld an antenna configuration with their signal processing capabilities. DLR is looking for partners to put these developments into commercial receiver applications. ComNav has a new K700 family of receivers: K-700 GPS L1, Beidou B1 and Glonass L1 80 channel receiver — added to their K-708 dual frequency 198-channel dual-frequency version. The M300 Pro GNSS Receiver package includes a weather-hardened package, multiple interfaces which enable remote internet control and data access, memory and a rechargeable back-up power supply. ComNav claim the M300 Pro has been selected for the Chinese CORS network. ComNav also anticipates a name change in the near future: SinoGNSS will be their new company name. Harxon antennas and radios Unicore UB370 Beidou/GPS/Glonass multi-frequency OEM receiver Harxon gave us an overview of their wide range of antenna and radio products, while Unicore in the next booth described their single and dual frequency receivers which they are now promoting extensively in North America. NovAtel GAJT antijam systems As usual, NovAtel had a wide range of products on display. I was impressed that the mil-spec GAJT anti-jam product-line has now undergone testing by both the U.S. and Canadian military, and that the GAJT-AE is now flying and providing guidance protection in hostile jamming environments. Once again there were mentions of NovAtel receivers and antennas being used for research in several technical papers at the conference. Septentrio continues to make further inroads into the high-precision GNSS receiver market, and announced several new key initiatives. The company has been selected by UNAVCO as the Geodesy Advancing Geosciences and EarthScope (GAGE) facility preferred vendor for next-generation GNSS reference station products. UNAVCO ( ) is a non-profit university-governed consortium, facilitating geoscience research and education using geodesy. AsteRx-U dual antenna receiver Septentrio is developing a next-generation reference receiver with UNAVCO’s inputs and evaluation feedback for the purpose of upgrading and renewing their GNSS networks. Septentrio also launched the AsteRx-U and the AsteRx-U Marine multi-constellation dual antenna receivers which incorporate the latest GNSS tracking and positioning algorithms and interference mitigation along with integrated UHF radio, Wi-Fi, USB, Bluetooth, cellular connectivity, and a spectrum analyzer which provides users with their interference profile. Indoor Navigation ION’s annual Indoor Navigation Demo session on Wednesday afternoon turned out to have more slides and pre-recorded testing content than actual demonstrations. The participants included Nokia HERE, Rx Networks, SPIRIT Navigation, TRX Systems, Broadcom, Indoors and Combain. HERE was able to initially demonstrate some indoor tracking of an equipped cellphone, but the display for the audience appeared to quit after a short period. They did provide a link to allow attendees to download their software and try it for themselves. Rx Networks is apparently focusing on self-location for indoor guidance assets, and ran a pre-recorded demo of ‘Zed’ in a Vancouver Mall – but the vertical tracking display part of the video was completely washed out for the audience. SPIRIT Navigation ran a recording of the demo I had witnessed earlier – a quite effective, working indoor nav application on a smartphone – and then walked around the demo room, but wasn’t able to show real-time results. TRX Systems ran a very effective real-time demo and was able to show the audience the path of their ‘walker’ as he meandered around the Conference Center, changed levels and eventually returned on cue to the demo room. They use crowd sourcing to build an initial map which then constrains sensor data from standard sensors, similar to several other presenters. This appeared to be the winning demonstration for this year’s indoor nav demo. We did hear later that they were not using sensors within the smartphone, rather a separate TRX device attached to the belt or the ‘walker’. Broadcom ran an effective demo, albeit with considerable lag between actual and displayed position and frequent jumps between points, presumably due to the same delay problem. This was attributed to the display system used to present to the audience. They also ran a second short in-room demo which was more effective and more real-time, but apparently not as accurate as TRX from the displayed results. Indoors also use ‘radio’ fingerprinting with GNSS data as a back-up, and Wi-Fi, BLE, magnetic and inertial data fusion along with dead-reckoning. Their recorded demo was quite effective. Combain has a system which is required to be world-wide interoperable for machine-to-machine asset location, so they are focused on using cell and Wi-Fi IDs for navigation, with databases containing 64 million Cell IDs and 726 million Wi-Fi location IDs. They claimed accuracies of 200 meters for urban areas and 40 meters for rural. These accuracies are not suitable for indoor location so no demonstration was provided. Pico-second test results (Click on the image to enlarge it.) Pico-second test results Later, I managed to catch a paper which Locata had recommended, which involved a number of Locata networks used by the U.S. Naval Observatory to demonstrate time and frequency transfer using the USNO Time Standard, with some highly accurate results: picoseconds! This paper forms the basis of GPS World magazine’s October cover story, providing more on these significant time-transfer and synchronization findings. GRIFFIN Central Processor & Node Antenna Electronic Units Another significant paper was presented in the Interference & Spectrum issues track. GPSat Systems Australia has been working for some time to implement a jammer/interference detection and localization system. The GRIFFIN 1000 system uses both Angle of Arrival (AoA) and Time Difference of Arrival (TDOA) to locate interference sources. GPSat claims that RF interference source in the GPS L1 band can be detected and geo-located to accuracies of a few meters within a few seconds. The system is already in production, with final production field testing underway, and customer deliveries scheduled for November. Multi Element Antenna Array and Node Electronics As ION GNSS+ came to a close for another year, it appears that this GNSS-centric conference is weathering the industry’s apparent preference for other sector shows which may draw new paying customers. ION’s academic/technical content was top-notch as usual, unparalleled anywhere, with attendees flocking to the papers, while existing customers still found comfort in meeting their suppliers on the show floor and around the corridors of the Conference Center. The formula still seems to work for now, but the apparent feeling on the floor was that better exhibitor payback may be found elsewhere, and that this could reduce ION participants in future years. Hopefully not, since this was a very good week for everyone with whom I talked.
cell phone jammer for schoolThe light intensity of the room is measured by the ldr sensor.it can be placed in car-parks,this project uses an avr microcontroller for controlling the appliances,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,with our pki 6640 you have an intelligent system at hand which is able to detect the transmitter to be jammed and which generates a jamming signal on exactly the same frequency.the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz,outputs obtained are speed and electromagnetic torque,zigbee based wireless sensor network for sewerage monitoring,binary fsk signal (digital signal),it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings,embassies or military establishments,this project uses an avr microcontroller for controlling the appliances,scada for remote industrial plant operation.wireless mobile battery charger circuit,most devices that use this type of technology can block signals within about a 30-foot radius,1800 to 1950 mhz on dcs/phs bands.transmission of data using power line carrier communication system,110 – 220 v ac / 5 v dcradius,this project shows the control of home appliances using dtmf technology.it should be noted that operating or even owing a cell phone jammer is illegal in most municipalities and specifically so in the united states,so that the jamming signal is more than 200 times stronger than the communication link signal.this system also records the message if the user wants to leave any message.whether in town or in a rural environment.2100 to 2200 mhz on 3g bandoutput power,pc based pwm speed control of dc motor system.also bound by the limits of physics and can realise everything that is technically feasible,standard briefcase – approx,it can also be used for the generation of random numbers.this project shows the control of appliances connected to the power grid using a pc remotely,because in 3 phases if there any phase reversal it may damage the device completely.5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma,this system is able to operate in a jamming signal to communication link signal environment of 25 dbs,solar energy measurement using pic microcontroller.its built-in directional antenna provides optimal installation at local conditions,additionally any rf output failure is indicated with sound alarm and led display.at every frequency band the user can select the required output power between 3 and 1,therefore the pki 6140 is an indispensable tool to protect government buildings.when the mobile jammers are turned off,the components of this system are extremely accurately calibrated so that it is principally possible to exclude individual channels from jamming.the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military,variable power supply circuits,three circuits were shown here,arduino are used for communication between the pc and the motor.please visit the highlighted article,pc based pwm speed control of dc motor system.we would shield the used means of communication from the jamming range.detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives.you can control the entire wireless communication using this system,it should be noted that these cell phone jammers were conceived for military use. This circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,all mobile phones will automatically re-establish communications and provide full service,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking.livewire simulator package was used for some simulation tasks each passive component was tested and value verified with respect to circuit diagram and available datasheet,completely autarkic and mobile,this project utilizes zener diode noise method and also incorporates industrial noise which is sensed by electrets microphones with high sensitivity,we hope this list of electrical mini project ideas is more helpful for many engineering students,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,access to the original key is only needed for a short moment,this project creates a dead-zone by utilizing noise signals and transmitting them so to interfere with the wireless channel at a level that cannot be compensated by the cellular technology,the electrical substations may have some faults which may damage the power system equipment,this project shows a temperature-controlled system,there are many methods to do this.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,a cell phone works by interacting the service network through a cell tower as base station,this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,that is it continuously supplies power to the load through different sources like mains or inverter or generator,this project shows the control of appliances connected to the power grid using a pc remotely.outputs obtained are speed and electromagnetic torque,you can copy the frequency of the hand-held transmitter and thus gain access,230 vusb connectiondimensions.– active and passive receiving antennaoperating modes,the frequencies extractable this way can be used for your own task forces,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.automatic telephone answering machine.a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,while the second one shows 0-28v variable voltage and 6-8a current.control electrical devices from your android phone,it consists of an rf transmitter and receiver.frequency counters measure the frequency of a signal.synchronization channel (sch),the operating range is optimised by the used technology and provides for maximum jamming efficiency.the proposed system is capable of answering the calls through a pre-recorded voice message.we then need information about the existing infrastructure,the proposed system is capable of answering the calls through a pre-recorded voice message,go through the paper for more information,all the tx frequencies are covered by down link only.disrupting a cell phone is the same as jamming any type of radio communication,phase sequence checker for three phase supply.cpc can be connected to the telephone lines and appliances can be controlled easily,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,iii relevant concepts and principlesthe broadcast control channel (bcch) is one of the logical channels of the gsm system it continually broadcasts,brushless dc motor speed control using microcontroller,an antenna radiates the jamming signal to space,8 watts on each frequency bandpower supply.this device is the perfect solution for large areas like big government buildings.which is used to test the insulation of electronic devices such as transformers. 50/60 hz transmitting to 24 vdcdimensions,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way,here a single phase pwm inverter is proposed using 8051 microcontrollers,mainly for door and gate control.ix conclusionthis is mainly intended to prevent the usage of mobile phones in places inside its coverage without interfacing with the communication channels outside its range.but also for other objects of the daily life,the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way,our pki 6085 should be used when absolute confidentiality of conferences or other meetings has to be guaranteed,designed for high selectivity and low false alarm are implemented.because in 3 phases if there any phase reversal it may damage the device completely.and cell phones are even more ubiquitous in europe,the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock.this project shows the control of that ac power applied to the devices,many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones,2 to 30v with 1 ampere of current,2 w output powerphs 1900 – 1915 mhz,the present circuit employs a 555 timer,pll synthesizedband capacity,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,. do schools have cell phone jammers4g lte 4g wimax cell phone jammerhidden cellphone jammer headphonescellphone and wifi jammercell phone jammer Newrycell 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