Patent application number | Description | Published |
20100103032 | Base Data Extrapolator to Operate with a Navigation Receiver in Real-Time Kinematic (RTK) and Differential Global Positioning System ( DGPS) Modes - Base data received at a rover receiver is extrapolated to a rover measurement time referenced to a clock in the rover receiver. The base data comprises a plurality of base parameters, such as pseudo-ranges and full phases, calculated at base epochs from data received from navigation satellites. Base data is decomposed into a computed component, a common component, and an information component. Only the information component is extrapolated, thereby increasing the extrapolation time interval (during which base data are missing) over which an acceptable accuracy in determination of rover coordinates may be provided. The extrapolated base data is calculated by adding the computed component updated to the rover measurement time, the information component extrapolated to the rover measurement time, and the common component. A second-order recursive digital filter is used to generate the extrapolation function. | 04-29-2010 |
20110260916 | METHOD FOR BUILDING A VIBRATION-RESISTANT NAVIGATIONAL SATELLITE SIGNALS RECEIVER AND A DEVICE FOR RECEIVING AND PROCESS NGNAVIGATION SIGNALS - The effects of shock and vibration on a navigation receiver processing satellite signals received from global navigation satellites are reduced by controlling the frequency and the phase of the individual numerically controlled oscillator in each individual satellite channel. The frequency is controlled by an individual frequency control signal based on individual correlation signals generated in an individual satellite channel. The phase is controlled by a common phase control signal or a combination of a common phase control signal and an individual phase control signal. The common phase control signal is based on all the correlation signals generated in all the satellite channels processed by a separate common broadband quartz loop (SCBQL). An individual phase control signal is based on the individual correlation signals generated in an individual satellite channel. | 10-27-2011 |
20130076564 | METHOD AND APPARATUS OF GNSS RECEIVER HEADING DETERMINATION - The present invention relates to processing information generated by GNSS receivers received signals such as GPS, GLONASS, etc. GNSS receivers can determine their position in space. The receivers are capable of determining both coordinates and velocity of their spatial movement. When a receiver is used in any machine control systems, velocity vector heading (in other words, velocity vector orientation) should be determined along with velocity vector's absolute value. Angle, determining velocity vector orientation, is calculated based on velocity vector projections which are computed in navigation receivers. The accuracy of velocity vector orientation calculated based on velocity vector projections strongly enough depends on velocity vector's absolute value. To enhance the accuracy, a method of smoothing primary estimates of velocity vector orientation angles using a modified Kalman filter has been proposed. The bandwidth of this filter is varied depending on current estimates of velocity vector's absolute value which were calculated based on the same velocity vector projections. | 03-28-2013 |
20140072084 | Digital system and method of estimating quasi-harmonic signal non-energy parameters using a digital Phase Locked Loop - The present invention proposes a digital system and method of measuring (estimating) non-energy parameters of the signal (phase, frequency and frequency rate) received in additive mixture with Gaussian noise. The first embodiment of the measuring system consists of a PLL system tracking variable signal frequency, a block of NCO full phase computation (OFPC), a block of signal phase primary estimation (SPPE) and a first type adaptive filter filtering the signal from the output of SPPE. The second embodiment of the invention has no block SPPE, and NCO full phase is fed to the input of a second type adaptive filter. The present invention can be used in receivers of various navigation systems, such as GPS, GLONASS and GALILEO, which provide precise measurements of signal phase at different rates of frequency change, as well as systems using digital PLLs for speed measurements. | 03-13-2014 |
20150063432 | DIGITAL SYSTEM AND METHOD OF ESTIMATING NON-ENERGY PARAMETERS OF SIGNAL CARRIER - Navigation satellite receivers have a large number of channels, where phase discriminators and loop filter of a PLL operate in phase with data bits and control of numerically controlled oscillator (NCO) carried out simultaneously on all channels. Since symbol boundaries for different satellites do not match, there is a variable time delay between the generation of control signals and NCO control time. This delay may be measured by counting a number of samples in the delay interval. A proposed system measures non-energy parameters of the BPSK-signal carrier received in additive mixture with noise when a digital loop filter of PLL controls NCO with a constant or changing in time delay. A control unit controls bandwidth and a LF order by changing transfer coefficients based on analyzing estimated signal parameters and phase tracking error at a PD output. | 03-05-2015 |
20150097724 | METHOD AND APPARATUS OF GNSS RECEIVER HEADING DETERMINATION - The present invention relates to processing information generated by GNSS receivers received signals such as GPS, GLONASS, etc. GNSS receivers can determine their position in space. The receivers are capable of determining both coordinates and velocity of their spatial movement. When a receiver is used in any machine control systems, velocity vector heading (in other words, velocity vector orientation) should be determined along with velocity vector's absolute value. Angle, determining velocity vector orientation, is calculated based on velocity vector projections which are computed in navigation receivers. The accuracy of velocity vector orientation calculated based on velocity vector projections strongly enough depends on velocity vector's absolute value. To enhance the accuracy, a method of smoothing primary estimates of velocity vector orientation angles using a modified Kalman filter has been proposed. The bandwidth of this filter is varied depending on current estimates of velocity vector's absolute value which were calculated based on the same velocity vector projections. | 04-09-2015 |
Patent application number | Description | Published |
20090029655 | Method and system for automatically establishing a dial-up connection to a network through a mobile device - There is provided a method for use by a computing device for automatically establishing a dial-up connection to a network through a mobile device. The method includes establishing a communication link with a mobile device. For example, the mobile device can be a cellular telephone and the communication link can be a Bluetooth communication link. The method further includes receiving network identification data from the mobile device, where the network identification data indicates the type of the network, e.g., Global System for Mobile (“GSM”) communications or Code Division Multiple Access (“CDMA”). The method further includes configuring a dial-up connection entry in the computing device and configuring connection entry in the mobile device based on the type of the network, and establishing the dial-up connection to the network using the dial-up connection entry. | 01-29-2009 |
20090055516 | Method and system for managing bluetooth communication using software or firmware filtering - Aspects of method and system for managing secure Bluetooth communication using software or firmware filtering are provided. In this regard, the IT or system administration may select one or more Bluetooth profiles for Bluetooth devices and inform the host software on the selection. The host software passes the information to host control interface (HCI). A Bluetooth security filter is integrated into the HCI to ensure a security policies set for the Bluetooth device. The Bluetooth security filter may be part of the Bluetooth host stack or the Bluetooth host controller stack. All HCI packets such as HCI commands, HCI events and HCI data packets are parsed in the Bluetooth security filter and act upon the policies determined by the IT or system administration. | 02-26-2009 |
20100144271 | METHOD AND SYSTEM FOR A REDUCED USB POLLING RATE TO SAVE POWER ON A BLUETOOTH HOST - A Bluetooth host in a normal mode is enabled to monitor activities at USB endpoints. A Bluetooth USB radio has one or more active Bluetooth connections with peer Bluetooth radios. When each of the Bluetooth connections is in sniff mode, the Bluetooth host enables cancellation of normal USB activities at USB endpoints to enter a low power mode. The Bluetooth connections are still alive while the Bluetooth host is in the low power mode. In the low power mode, the Bluetooth host is enabled not to poll the bulk endpoint and to poll a USB interrupt endpoint in extended intervals for Bluetooth data received from the Bluetooth USB radio. The Bluetooth host is enabled to switch from the low power mode to the normal mode to process the received Bluetooth data over the bulk endpoint when a specific HCI event is received over the interrupt endpoint. | 06-10-2010 |
20120003932 | METHOD AND SYSTEM FOR REDUCING POWER CONSUMPTION IN BLUETOOTH PROXIMITY IMPLEMENTATIONS - A Bluetooth host controller located in a Bluetooth proximity host comprising a Bluetooth host device may be configured to automatically generate a set of notifications or triggers based on the relative proximity to other Bluetooth devices. The Bluetooth host device stays in a lower power mode until one of the Bluetooth triggers is received. | 01-05-2012 |
20120142271 | Windows Portable Devices Interface for Bluetooth Low Energy Devices - A method and system are provided in which a Windows Portable Devices (WPD) driver installed and executed on a central device enables one or more applications on that device to interface with a peripheral device, such as a Bluetooth low energy (BLE) device. The peripheral device may utilize a Generic Attribute Profile (GATT) to interface with the WPD driver. Through the WPD driver, the central device may access, transmit, receive, and/or modify information associated with the peripheral device and/or control the peripheral device. The information associated with the peripheral device may include services, characteristics, and/or descriptors. A WPD device and objects that logically or virtually represents the peripheral device may be generated to map attributes of the WPD device to services and/or characteristics associated with the peripheral device. More than one WPD device may be available when multiple peripheral devices are represented in the central device. | 06-07-2012 |
20120149305 | METHOD AND SYSTEM FOR A REDUCED USB POLLING RATE TO SAVE POWER ON A BLUETOOTH HOST - A Bluetooth host in a normal mode is enabled to monitor activities at USB endpoints. A Bluetooth USB radio has one or more active Bluetooth connections with peer Bluetooth radios. When each of the Bluetooth connections is in sniff mode, the Bluetooth host enables cancellation of normal USB activities at USB endpoints to enter a low power mode. The Bluetooth connections are still alive while the Bluetooth host is in the low power mode. In the low power mode, the Bluetooth host is enabled not to poll the bulk endpoint and to poll a USB interrupt endpoint in extended intervals for Bluetooth data received from the Bluetooth USB radio. The Bluetooth host is enabled to switch from the low power mode to the normal mode to process the received Bluetooth data over the bulk endpoint when a specific HCl event is received over the interrupt endpoint. | 06-14-2012 |