Air Semiconductor, Ltd.

U-blox Ag

Dialog Semiconductor Gmbh

David P Tester

Stephen P Graham

Nigel J Tolson

Ian G Watson

Adrian Philip Wise

Gary Hague

Mario A Bedoya Martinez

Jorg Medwed

Gareth Williams

A method of fast acquisition of a location of a device is disclosed. The method generally includes the steps of (A) repeatedly powering up automatically (i) a radio receiver and (ii) a given subset of a plurality of correlators in some of a plurality of search engines in the device, (B) buffering first data of a plurality of position signals received through the radio receiver over a first period, each of the position signals comprising a respective one of a plurality of code sequences, (C) searching through the first data with the correlators to find at least one of the code sequences, each of the correlators using a search window comprising a fraction of a code length of the code sequences and (D) generating an output signal carrying a location of the device based on the position signals corresponding to the code sequences that were found.

Fast acquisition engine

A method of enabling navigation from a headset is disclosed. The method generally includes the steps of (A) receiving a first signal transmitted by a device to the headset through a wireless personal area network, the first signal carrying assist data transmitted by an Assisted Global Positioning System server, (B) receiving a plurality of navigation signals transmitted by a navigation system to the headset and (C) calculating a current position of the headset at a first time using the assist data to lock onto the navigation signals.

Navigation system enabled wireless headset

A method of variable rate measurements in a device. The method generally includes the steps of (A) generating an intermediate signal conveying both a position of the device and a velocity of the device in response to a plurality of navigation signals received from external the device, (B) calculating an extrapolated position of the device at a second time based on the position and the velocity both measured at a first time, (C) adjusting an interval between the second time and a third time in response to a difference between the extrapolated position and the position measured at the second time and (D) generating a position signal conveying the position and the velocity, wherein the third time occurs after the second time and the second time occurs after the first time.

Variable measurement rate method for positioning systems

A method for location-based zone triggering is disclosed. The method generally includes the step of (A) generating a position signal conveying a location of a device in at least two spatial dimensions in response to a plurality of navigation signals received from external the device and (B) generating a trigger signal at an interface based on the position signal, (i) a first aspect of the trigger signal indicating that the location is crossing a boundary of a zone, (ii) a second aspect of the trigger signal indicating that the device is one of entering the zone and leaving the zone and (iii) the interface adapting a zone module to communicate the trigger signal to an application module.

Hot zones trigger method for location-based applications and services

A method to establish a position of a device receiving an input signal containing data from a plurality of satellites is disclosed. The method generally includes the steps of (A) calculating (i) an estimated position of the device and (ii) an estimated velocity vector of the device, (B) calculating a plurality of estimated locations of a plurality of pseudo-random code sequences in the input signal based on (i) the estimated position and (ii) the estimated velocity vector and (C) generating the position in an output signal based on the pseudo-random code sequences.

Always-on satellite positioning receiver

A method of last known position reporting in a device is disclosed. The method generally includes the steps of (A) generating a request signal in an application module of the device, the request signal requesting a current position of the device while a plurality of navigation signals are too weak to calculate the current position, (B) calculating a sequence of known positions in a position module of the device, the known positions being calculated based on the navigation signals with sufficient strength, (C) calculating the current position in the position module in response to the request signal, the current position being calculated based on a last of the known positions and (D) generating a position signal in the position module, the position signal reporting the current position as a valid position to the application module.

Last known position reporting for always-on global positioning system receiver

A method to reduce power consumption in a device is disclosed. The method generally includes the steps of (A) generating a plurality of pseudorange signals by tracking a plurality of position signals received from a plurality of satellites in a positioning system, at least one of the position signals from each one of the satellites respectively, (B) calculating both an initial position and an initial time bias from the pseudorange signals using a processing capability of the device at a normal capacity and (C) calculating both an updated position and an updated time bias using the processing capability reduced to a first capacity, wherein the first capacity (i) consumes less power than the normal capacity and (ii) is suitable to process the updated position and the updated time bias using a limited number comprising less than all of the pseudorange signals.

PVT optimization architecture for always-on GPS receivers

A method for establishing a position of a device is disclosed. The method generally includes the steps of (A) receiving an input signal from a receiver listening to a plurality of satellites in a positioning system, (B) calculating (i) a plurality of estimated Doppler shifts of the satellites, (ii) an estimated position of the device and (iii) an estimated velocity of the device, (C) generating a plurality of pseudo-ranges in an intermediate signal based on all of (i) the input signal, (ii) the estimated Doppler shifts, (iii) the estimated position and (iv) the estimated velocity and (D) generating the position in an output signal based on the pseudo-ranges.

An accurate high current mirror circuit produces a mirrored current that matches an input current to produce an accuracy at the output of a subsequent stage of amplification of greater than 0.01%. A plurality of transistor devices are arranged in a symmetrical configuration and divided into two groups. The transistors in each of the two groups are connected in parallel to produce a high mirror current from a high input current. A distribution of a source voltage produces the same source voltage at each of the plurality of transistors. An input current metallization and a mirror current metallization are formed within the symmetrical configuration to have a same value of impedance. A plurality of P-channel transistors within the current mirror circuit control a voltage of a point on the input metallization to be the same as a reference voltage, thus causing the mirror current to be referenced around the reference voltage.

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Swindon, United Kingdom

David P Tester