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Class 342/464 - Plural transmitters only


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including more than one transmitter.
No. of patents: 198
Last issue date: 05/29/2012


1          
NumberTitleIssue Date
8188923Method of multi-transmitter and multi-path AOA-TDOA location comprising a sub-method for synchronizing and equalizing the receiving stations
Method and system for locating one or more transmitters in the potential presence of obstacles in a network comprising a first receiving station A and a second receiving station B that is asynchronous with A. The method includes the identification of a reference tra...
05/29/2012
8184053Position estimating system, radio communication apparatus, program, position estimating method and information server
A radio communication apparatus has a storage section for correlating and storing positional information and identification information of the base station, a receiving section for receiving radio signals transmitted from the base station and containing the identifi...
05/22/2012
8149169Extensible object location system and method using multiple references
An ultra wideband (UWB) or short-pulse RF system is disclosed that can be used to precisely locate or track objects (such as personnel, equipment, assets, etc.) in real-time in an arbitrarily large, physically connected or disconnected, multipath and/or noisy enviro...
04/03/2012
8125377System and method for determining the location of a mobile device
A system and method for determining the location of a mobile device. A first set of signals from a plurality of radio frequency (“RF”) sources may be received at a mobile device and then downconverted into a second set of signals. The mobile device may then time...
02/28/2012
8120533Method and system for deriving location information from utility lines
Location systems and methods are implemented using a variety of arrangements and methods. Using one such system location information is provided in response to a utility-line arrangement propagating signals that represent a wireless radio-frequency (RF) communicatio...
02/21/2012
8089408Robust low-frequency spread-spectrum navigation system
Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each ...
01/03/2012
8085201System for determining position over a network
A system to determine position, frequency and clock offsets over a network utilizing signals of opportunity transmitted by one or more transmitters with known locations, the system includes a base receiver with a clock and a known position that determines ranges to ...
12/27/2011
7893875Device for and method of geolocation
A device and method of geolocating a transmitter. First and second receivers, in motion, receive a signal from the transmitter. Digitizers in the receivers digitize the signal. Converters in the receivers for converting the digitized signals to complex-valued signal...
02/22/2011
7876267Robust low-frequency spread-spectrum navigation system
Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each ...
01/25/2011
7855684Method and system for locating sensor node in sensor network using distance determining algorithm
For a sensor network having reference nodes and sensor nodes, A method and apparatus using a distance determining algorithm for a sensor network having reference nodes and sensor nodes. A distance determining algorithm is executed to determine an adequate distance b...
12/21/2010
7737893Positioning in a single-frequency network
Apparatus having corresponding methods and computer-readable media comprise a receiver adapted to receive a plurality of single-frequency network (SFN) signals at a predetermined frequency; a correlator adapted to correlate the SFN signals with a predetermined refer...
06/15/2010
7733270Position location using global positioning signals augmented by broadcast television signals
Apparatus having corresponding methods and computer-readable media comprises: a first receiver adapted to receive, at a user terminal, a broadcast television signal from a television signal transmitter; and a second receiver adapted to receive, at the user terminal,...
06/08/2010
7636061Method and apparatus for location determination of people or objects
A system and method for determining the position of people and/or objects, whether mobile or stationary, is presented herein. The system uses fixed and/or portable FM transmitters to transmit synchronized signals. These signals are acquired by a Receiver device whic...
12/22/2009
7633443Estimating location of a communications device
In determining a location estimate for a communications device, at least one first location estimate is determined based on information relating to signals transmitted between the communications device and at least one first antenna of a communications system. At le...
12/15/2009
7616157System and method for effectively performing enhanced mobile-device location procedures
A system and method for effectively performing enhanced device location procedures to determine the current physical location of a mobile device includes a plurality of satellites that wirelessly transmit satellite beacon signals, a plurality of base stations that w...
11/10/2009
7576694Secure wireless user localization scheme using transmission range variation
A secure localization method for wireless networks utilizes access point variable transmission power capability to transmit encoded localization signals at different power levels to a wireless device in the network. Based on the particular combination of encoded sig...
08/18/2009
7551137Apparatus and method for tracing a path travelled by an entity or object, and tag for use therewith
Apparatus and method for tracing a geographical journey taken by an entity, for example an article (shipment), asset or person, on a worldwide map uses a miniature, passive, low power, radio receiver tag that is attached to the entity and collects multiple FM spectr...
06/23/2009
7515104Structured array geolocation
Methods and systems for providing an improved geolocation of a plurality of transmitters are disclosed. In one embodiment, a method for providing a geolocation of a plurality of transmitters includes determining a relative location of each transmitter in the plurali...
04/07/2009
7511667Precise local positioning systems using ground-based transmitters
A precise positioning method and system is disclosed wherein at least one ground transmitter is used for transmitting a ranging signal with code modulation. The at least one ground transmitter is configured to receive a signal from at least one satellite and a secon...
03/31/2009
7474265Inter-network operation of multiple location networks
The present invention discloses a system and method for allowing a position receiver to determine position solutions from positioning signals from a plurality of autonomous positioning networks, each of which is synchronized to a different timebase. Each of the plur...
01/06/2009
7468697Self-surveying wideband ground transmitters
A precise positioning method and system is disclosed for allowing an array of ground transmitters to self-survey their relative location at centimeter-level accuracy by transmitting, amongst the ground transmitters in the array, bi-directional ranging signals associ...
12/23/2008
7411549Calibration of a device location measurement system that utilizes wireless signal strengths
An architecture for minimizing calibration effort in an IEEE 802.11 device location measurement system. The calibration technique is based upon a regression function that produces adequately accurate location information as a function of signal strength regardless o...
08/12/2008
7400974Method and apparatus for locating position of a GPS device
A method and apparatus for locating position of a GPS device is described. In one example, a method for provisioning a mobile device with a model for determining a position of the mobile device in at least one geographic area is provided. The method includes obtaini...
07/15/2008
7400890Method for decision of time delay by repeater in mobile communication network
A method for determination of a repeater time delay in a mobile communication network, without affecting a correct positioning of a mobile terminal, is disclosed. The method includes the steps of determining an initial estimated position of a mobile communication te...
07/15/2008
7389114Estimating the location of inexpensive wireless terminals by using signal strength measurements
A system is disclosed that enables the estimation of the location of a wireless terminal in a wireless network. The illustrative embodiment works without requiring modifications to be made to the wireless terminal. Furthermore, the hardware of some embodiments of th...
06/17/2008
7388541Self-calibrating position location using periodic codes in broadcast digital transmissions
A broadcast digital transmission (BDT) receiver, computer-readable media, and associated method for receiving and processing of BDT signals from a plurality of transmitters. A BDT receiver includes an antenna to intercept broadcast radio signals and an analog front-...
06/17/2008
7385554Satellite and local system position determination
In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Dif...
06/10/2008
7382318Land-based local ranging signal methods and systems
To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinem...
06/03/2008
7379744Positioning system, positioning method, and positioning server
To provide a positioning system, a positioning method, and a positioning server, which are capable of improving accuracy in detection of a position. In a positioning system, three or more access points connected to a terminal station by wireless communication are co...
05/27/2008
7372405Position location using digital video broadcast television signals
Apparatus to determine the position of a user terminal, the apparatus having corresponding methods and computer-readable media, comprises a receiver to receive, at the user terminal, a wireless orthogonal frequency-division multiplexing (OFDM) signal comprising a sc...
05/13/2008
7370362Method and apparatus for locating rogue access point switch ports in a wireless network
Methods and apparatus are disclosed for locating and disabling the switch port of a rogue wireless access point. In one embodiment, a network management device is configured to detect the presence of a rogue access point on a managed wireless network. Once detected,...
05/06/2008
7363043Passive GSM-based self-locating device
A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed time differences between a local base station and at least two additi...
04/22/2008
7362270System and method to perform network node localization training using a mobile node
A method and system for determining a location of at least one stationary node of a wireless network, which includes providing a predetermined path within a geographic space of the wireless network, prior to localization, moving a mobile node along the predetermined...
04/22/2008
7356388Prevention of interference from movable radiation networks
A radio interference avoidance system (1) has a processor in a detection system (11) which receives real time inputs from various sensors (12-16). The processor dynamically determines if a craft (for example, ship) movable network (19
04/08/2008
7345627Land-based local ranging signal methods and systems
To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinem...
03/18/2008
7346345Positioning in a telecommunications system
A telecommunications system comprises a first transmitter unit situated at a first, known location; a second transmitter unit situated at a second, unknown location; a first receiving unit at a third, known location arranged to receive signals from the first and sec...
03/18/2008
7342538Asynchronous local position determination system and method
In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing of...
03/11/2008
7339526Synchronizing ranging signals in an asynchronous ranging or position system
In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing of...
03/04/2008
7339525Land-based local ranging signal methods and systems
To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinem...
03/04/2008
7339523Navigation system using radio frequency tags
A method of determining a location is provided. The method comprises placing a plurality of radio frequency (RF) tags within an area, mapping the placement of the plurality of RF tags within the area, detecting one or more of the plurality of RF tags in the area, an...
03/04/2008
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