Abstract:
Method and apparatus for locating position of a remote receiver is described. In one example, long term satellite tracking data is obtained at a remote receiver. Satellite positioning system (SPS) satellites are detected. Pseudoranges are determined from the remote receiver to the detected SPS satellites. Position of the remote receiver is computed using the pseudoranges and the long term satellite tracking data. SPS satellites may be detected using at least one of acquisition assistance data computed using a previously computed position and a blind search. Use of long term satellite tracking data obviates the need for the remote receiver to decode ephemeris from the satellites. In addition, position of the remote receiver is computed without obtaining an initial position estimate from a server or network.
Abstract:
A system and method examines the quality of a positioning signal acquisition assistance window of an assisted position location system. The fit of acquisition assistance windows is examined using a posteriori knowledge of specific, or hypothetical, position measurements from a mobile station. A base station almanac manager compares mobile station measurement data to acquisition assistance window data, records an outcome based upon the comparison including a window quality value ( W Q ), or range of window quality values. Source data used in the generation of acquisition assistance windows is adjusted according to the window quality value.
Abstract:
A method and apparatus for distributing satellite navigation data is described. In one example, satellite signals are processed at each of a plurality of reference stations to receive a respective plurality of satellite navigation data streams. Packets are formed in response to said plurality of satellite navigation data streams to generate a plurality of packetized satellite navigation data streams. The packetized satellite navigation data streams are sent to a processing system. The processing system removes duplicate packets within said plurality of packetized satellite navigation data streams to generate a combined packet system. The combined packet stream is then sent into a communication network.
Abstract:
An assisted wireless position determination system includes a plurality of base stations and a plurality of wireless devices, such as mobile telephones and personal digital assistants, adapted to communicate with the base stations. The wireless position determination system also includes a position determination system for determining the geographic position of the wireless devices. The position determination system includes a position determination entity (PDE) that is connected to the base stations and serves as a processing server for computing the position of the wireless devices. The system and method reduces or eliminates redundant and superfluous data. In addition, the system and method ensure that the wireless device is not loaded with additional capacity, and that the wireless device is provided with precise location information. The embodiments of the system and method of the invention are compliant with the TIA/EIA IS-801 standard or other standards.
Abstract:
The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data.
Abstract:
The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data.
Abstract:
Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device (102) can quickly determine its relative and/or coordinate position based on information provided by an access point (101) in the WLAN. Before the wireless device (102) disassociates with the access point (101), the WLAN can periodically provide time, location, and decoded GPS data to the wireless device (101). In this manner, the wireless device (102) can significantly reduce the time to acquire the necessary GPS satellite data to determine its coordinate position.
Abstract:
A server is disclosed which is configured to transmit to a remote GPS receiver upon determining the availability of updated assistance data for assisting the GPS receiver to acquire GPS signals either a signal notifying the GPS receiver of such availability or a signal containing the updated assistance data. Such a server may be configured to both transmit a signal notifying the GPS receiver of such availability and, upon receiving a request from the remote GPS receiver for the updated assistance data, to transmit the updated assistance data to the GPS receiver. Also disclosed is a GPS receiver configured to request from a remote server updated assistance data for assisting the GPS receiver to acquire GPS signals upon determining that such assistance data currently stored by the GPS receiver is invalid.
Abstract:
A mobile terminal is configured to receive wireless communications including GPS data from a terrestrial and/or satellite wireless network, and to perform pseudo-range measurements using the GPS data that is received. The mobile terminal may be configured to perform pseudo-range measurements by receiving GPS coarse/acquisition (C/A) signals from GPS satellites, estimating Doppler shifts in the received GPS C/A signals, and estimating received code phases of the GPS C/A signals using the Doppler shifts that are estimated. The estimated code phases and/or the estimated Doppler shifts of the GPS C/A signals can provide the pseudo-range measurements. By removing the Doppler shift from the received signal samples prior to performing the code phase measurement, reduced computational complexity and/or processing time may be obtained.
Abstract translation:移动终端被配置为从陆地和/或卫星无线网络接收包括GPS数据的无线通信,并且使用接收的GPS数据来执行伪距测量。 移动终端可以被配置为通过从GPS卫星接收GPS粗略/获取(C / A)信号来执行伪距测量,估计所接收的GPS C / A信号中的多普勒频移,以及估计GPS C / 使用估计的多普勒频移的信号。 GPS C / A信号的估计码相位和/或估计的多普勒频移可提供伪距测量。 通过在执行码相位测量之前从接收到的信号样本中去除多普勒频移,可以获得降低的计算复杂度和/或处理时间。
Abstract:
A network (300), network device and method is disclosed. In one embodiment, a method includes transmitting communication signals (52) from a first network node (100) to a second network node (100), where the first and second network nodes (100) comprise a network and each include a receiver portion and a transponder portion. The method further comprises receiving, by the first and second network nodes (100), position signals (48) from a plurality of navigation beacons (310), and generating transmitter codes for the transponder portions using local code generators (36) of the receiver portions.