09/06/2000
Description Interference Conditions
This mobile E911 GPS application should not be disrupted by Ultra wideband (UWB) emitter(s); including:
1) a single UWB emitter located within 2 meters from a mobile E911 GPS cellphone;
2) a network of UWB emitters operating at maximum capacity (total- number of units and data rate) in a building whose doors and windows are located within 2 meters from a mobile E911 cellphone;
3) an outdoor synchronous network of UWB communications emitters operating at maximum capacity (total number of units and data rate) with the closest UWB emitter in the network located within 2 meters from a mobile E9l1 cellphone.
The UWB emitter(s), including communications tracking, and positioning, in this operational scenario is set to operate directly across the GPS Ll, L2 and L5 signals. This UWB waveform to be tested will be certified as the worse case allowable waveform with respect to GPS.
Analytic model:
This operational scenario test objective is to understand interference to GPS from a UWB waveform that is uniquely defined only in the time domain. Consequently, using the more familiar frequency domain analytic tools to perform an operational scenario interference analysis--a link margin budget--can be established only for a uniquely defined time domain waveform. In the case of networks of UWB communications emitters, a link margin budget needs to address all network parameters, including but not limited to, the number of units and their geographic extent, networking techniques and temporal codes, in the absence of such specificity, a traditional link margin analysis cannot be performed.
Interference Test Data
Use the Department of Transportation (DoT)/Stanford University test data (e.g. WAAS aviation receiver) and National Telecommunications Information Administration (NTIA) test data, as a baseline performance for GPS included in cell phones. Define the proposed UWB communications waveform to be licensed. Develop a link-margin analysis which will not create GPS degradation in the time of arrival, using this specified UWB waveform, at two meters for each of the above three interference scenarios,
Operational scenario:
GPS is expected to operate not only in the open countryside, but also with 75% to 100% tree canopy and at the intersections of downtown metropolitan areas. This means that it is the reception from the weakest GPS satellite that must be monitored.
Consequently, this operational testing should not be done in the open countryside, but in the following more operationally realistic environments:
1) Turn on GPS cellphone, and obtain a GPS position fix at one location;
2) Talk on cell phone; terminate call; turn-off cell phone;
3) Get in auto and drive 10 miles and park;
4) Walk along sidewalk and notice 911 incident. Stop walking to turn on the cell phone to call 911 to report the incident; obtain new GPS position fix. (last GPS position fix will be provided);
5) Attempt to update to obtain new GPS position fix in presence of each of the above three interfering conditions; turning the GPS receiver on and off each time,
6) Turn on the GPS cell phone and observe the effect on the ability to obtain the new GPS position fix to conduct E911 reporting.
09/06/2000
E911 EMERGENCY RESPONSE: GPS INCLUDED IN AN E911 EMERGENCY VEHICLE
Description Interference Conditions
This mobile E911 GPS application should not be disrupted by Ultra wideband (UWB) emitter(s); including:
1) a single UWB emitter located within 2 meters from a mobile E911 GPSequipped emergency response vehicle;
2) a network of UWB emitters operating at maximum capacity (including total number of units and data rate) in a building whose doors and windows are located within 2 meters from a mobile E911 GPS-equipped emergency response vehicle;
3) an outdoor synchronous network of UWB communications emitters operating at maximum capacity (including total number of units and data rate) with the closest UWB emitter in the network located within 2 meters from a mobile E911 GPS-equipped emergency response vehicle;
4) a single UWB emitter located in a mobile cellphone introduced on a temporary basis into the cab of the E911 GPS-equipped emergency response vehicle by the driver; and a second UWB emitter located in a laptop computer also is introduced on a temporary basis into the cab of this vehicle.
The UWB emitter(s), including communications, tracking, and positioning, in this operational scenario is set to operate directly across the GPS LI, L2 and L5 signals. This UWB waveform to be tested will be certified as the worse case allowable waveform with respect to GPS.
Analytic model:
This operational scenario test objective is to understand interference to GPS from a UWB waveform that is uniquely defined only in the time domain. Consequently, using the more familiar frequency domain analytic tools to perform an operational scenario interference analysis--a link margin budget--can be established only for a uniquely defined time domain waveform. in the case of networks of UWB
communications emitters, a link margin budget needs to address all network parameters, including but not limited to, the number of units and their geographic extant, networking techniques and temporal codes. In the absence of such specificity, a traditional link margin analysis cannot be performed.
Interference Test data:
Use the Department of Transportation (DoT)/Stanford University test data (e.g. WAAS aviation receiver) and National Telecommunications Information Administration (NTIA) test data, as a baseline performance for GPS included in emergency vehicles being tracked and dispatched by a central control center. Define the proposed UWB communications waveform to be licensed, Develop a link-margin analysis which will not create GPS degradation in the time of arrival and that will result in loss of tracking this E911 vehicle at the dispatch center, using this specified UWB waveform, at two meters for each of the above four interference conditions.
Operational scenario:
1) Turn on the in-vehicle GPS unit and track this moving, unassigned E911 GPS-equipped emergency medical ambulance at the dispatch center (position updates of one minute).
2) The moving, unassigned E911 GPS-equipped emergency vehicle travels an additional 44 seconds and stops near a construction site with a UWB communications device/network transmitting position fixes and construction video within 2 meters. The driver turns off the engine and places a mobile cellular call and turns on the laptop computer.
3) Turn on the GPS receiver and observe the effect on the ability to obtain the GPS position fix to provide E91 I emergency vehicle reporting back to the dispatch center which now has an urgent E911 dispatch and client pick-up and needs to locate, assign, and reroute this uniquely equipped E911 emergency response vehicle.
09/06/2000
Description Interference Conditions
This mobile E911 disaster response GPS application should not be disrupted by Ultra wideband (UWB) emitter(s); including:
1) a single UWB emitter located within 2 meters from mobile E911 GPSequipped emergency response vehicle(s);
2) a network of UWB emitters operating at maximum capacity (total number of units and data rate) in a building whose doors and windows are located within 2 meters from mobile E911 GPS-equipped emergency response vehicle(s);
3) an outdoor synchronous network of UWB communications emitters operating at maximum capacity (including total number of units and data rate) with the closest UWB emitter in the network located within 2 meters from mobile E911 GPS-equipped emergency response vehicle(s);
4) a single UWB emitter located in a mobile cellphone introduced on a temporary basis into the cab of the E911 GPS-equipped emergency response vehicle by the driver; and a second UWB emitter located in a laptop computer also is introduced on a temporary basis into the cab of this vehicle.
The UWB communications emitter(s) in this operational scenario is set to operate directly across the GPS Ll, L2 and L5 signals and the UWB waveform to be tested will be certified as the worse case allowable waveform with respect to GPS.
Analytic model:
This operational scenario test objective is to understand interference to GPS from a UWB waveform that is uniquely defined only in the time domain. Consequently, using the more familiar frequency domain analytic tools to perform an operational scenario interference analysis--a link margin budget--can be established only for a uniquely defined time domain waveform, In the case of networks of UWB communications emitters, a link margin budget needs to address all network parameters, including but not limited to, the number of units and their geographic
extant, networking techniques and temporal codes, In the absence of such specificity, a traditional link margin analysis cannot be performed.
Interference Test Data
Use the Department of Transportation (DoT)/Stanford University test data (e.g. WAAS aviation receiver) and National Telecommunications Information Administration (NTIA) test data, as a baseline performance for GPS included in cell phones. Define the proposed UWB communications waveform to be licensed. Develop a link-margin analysis which will not create GPS degradation in the time of arrival, using this specified UWB waveform, at two meters for each of the above four interference conditions.
Operational scenario:
Disaster response emergency operations should show no discernible degradation due to mobile cellular UWB communications, operating either singularly, or in emergency communications networks.
Following a major hurricane, rescue response efforts, involving multiple GPS-based land, air, and seacraft are to be dispatched from several jurisdictions and directed in relief efforts, involving survivors, without discernible interference and loss of , accuracy in the presence of a network of UWB communications devices deployed and concentrated in the same geographic region.
1) Dispatch and track several GPS-equipped emergency medical vehicles, including: paramedic ambulances, firetrucks, police cruisers, paramedic helicopters, and rescue watercraft at the dispatch center (position updates of several seconds).
2) These vehicles will travel among networks of existing UWB and other communications devices, including UWB communications networks deployed for this disaster response effort; and among survivors seeking emergency assistance using their mobile UWB cellular devices, It is critical that interference exhibited by UWB communications devices does not exceed the levels of interference due to current cellular techniques. (Current cellular techniques do not show any significant degradation to GPS).
3) Turn on the GPS receiver in the various vehicles and observe the effect on the ability to operate a disaster response command and control GPS-based emergency dispatch center.
09/06/2000
Description Interference Conditions
This mobile E911 GPS application should not be disrupted by Ultra wideband (UWB) emitter(s); including:
1) a single UWB emitter located within 2 meters from a mobile GPS-equipped GIS data recorder;
2) a network of UWB emitters operating at maximum capacity (including total number of units and data rate) in a building whose doors and windows are located within 2 meters from a mobile GPS-equipped GIS data recorder;
3) an outdoor synchronous network of UWB communications emitters operating at maximum capacity (including total of units and data rate) with the closest UWB emitter in the network located within 2 meters from a mobile GPS-equipped GIS data recorder;
4) a single UWB emitter located in a mobile cellphone introduced on a temporary basis by the driver into the cab of a government vehicle to be deployed in mobile GPS-equipped GIS data collection (e.g., mobile data collection for post disaster damage assessments to prepare report to the Governor for a "state of emergency" declaration as occurred in the Berkley-Oakland Hills Fire): and a second UWB emitter located in a laptop computer also is introduced on a temporary basis into the cab of this vehicle, while the assistant conducts real-time mobile GPS/GIS data collection.
The UWB emitter(s), including communications, tracking, and positioning, in this operational scenario is set to operate directly across the GPS Ll, L2 and L5 signals. This UWB waveform to be tested will be certified as the worse case allowable waveform with respect to GPS.
Analytic model:
This operational scenario test objective is to understand interference to GPS from a UWB waveform that is uniquely defined only in the time domain. Consequently, using the more familiar frequency domain analytic tools to perform an operational scenario interference analysis--a link margin budget--can be established only for a uniquely defined time domain waveform. In the case of networks of UWB communications emitters, a link margin budget needs to address all network parameters, including but not limited to, the number of units and their geographic extant, networking techniques and temporal codes. In the absence of such specificity, a traditional link margin analysis cannot be performed.
Interference Test data:
Use the Department of Transportation (DoT)/Stanford University test data (e,g. WAAS aviation receiver) and National Telecommunications Information Administration (NTIA) test data, as a baseline performance for GPS included in emergency vehicles being tracked and dispatched by a central control center. Define the proposed UWB communications waveform to be licensed. Develop a link-margin analysis which will not create GPS degradation in the time of arrival and that will result in impeding GPS/GIS data collection, using this specified UWB waveform, at two meters for each of the above four interference conditions.
Operational scenario:
1) Local governments establish GIS databases as an information resource using data that is geographically rectified and containing the precise location of assets, for multi-purpose local use, including to provide immediate information during disaster management and response.
2) Mobile GPS-based GIS devices are used to collect data for location-based information systems or databases. This data is systematically updated at consistent intervals during normal times. Field variations in this data are used to detect changes that took place during a state of emergency, such as a natural disaster.
3) Turn on the receiver, and observe if the mobile GPS-based GIS recorders can accurately collect data in the presence of UWB interference for each of the above four interference conditions?
09/06/2000
Description Interference Conditions
This mobile high precision GPS application should not be disrupted by Ultra wideband (UWB) emitter(s); including:
1) a single UWB emitter located within 2 meters from a piece of heavy machinery operating with high precision GPS
2) a network of UWB emitters operating at maximum capacity (including total number of units and data rate) in a construction site building whose doors and windows are located within 2 meters from a piece of heavy machinery operating with high precision GPS:
3) an outdoor synchronous network of UWB communications emitters operating at maximum capacity (including total number of units and data rate) with the closest UWB emitter in the network located within 2 meters from a piece of heavy machinery operating with high precision GPS.
The UWB emitter(s), including communications, tracking, and positioning, In this operational scenario is set to operate directly across the GPS LI, L2 and L5 signals. This UWB waveform to be tested will be certified as the worse case allowable waveform with respect to GPS.
Analytic model:
This operational scenario test objective is to understand interference to GPS from a UWB waveform that is uniquely defined only in the time domain. Consequently, using the more familiar frequency domain analytic tools to perform an operational scenario interference analysis--a link margin budget--can be established only for a uniquely defined time domain waveform. In the case of networks of UWB communications emitters, a link margin budget needs to address all network parameters, including but not limited to, the number of units and their geographic extant, networking techniques and temporal codes. In the absence of such specificity, a traditional link margin analysis cannot be performed.
Interference Test Data:
Use the Department of Transportation (DoT)/Stanford University test data (e.g. a narrow correlator WAAS base station receiver) and National Telecommunications Information Administration (NTIA) test data, as a baseline performance for high precision GPS included in control of heavy machinery. Develop a link-margin analysis which will not create GPS degradation, or dropout of GPS reception at an open construction site, at two meters. The probability of rupturing underground pipes due to inaccuracies in blade control should not be noticeably increased due to the presence of UWB interference.
Operational scenario:
1) In this operational scenario at a construction site, underground pipes on the construction site would be mapped in advance, using GPS. The precision GPS-equipped bulldozers would be programmed with this information on the location of underground pipes at the construction site. The bulldozer blade is controlled at the one inch level.
2) In the presence of the three interference conditions, turn on the GPS receiver and observe the effect on the operation of the precision GPS-equipped bulldozer at this construction site.