Maxlinear, Inc.

Staccato Communications, Inc.

Samsung Electronics Co., Ltd.

Nishant Kumar

Maxime Leclercq

Ioannis Spyropoulos

Torbjorn Larsson

Anand Anandakumar

Dan Meacham

Timothy Leo Gallagher

James Laurence Taylor

Nicholas Michael Carbone

Saju Palayur

Ioannis Spryopoulos

Methods and systems for repurposing of a global navigation satellite system receiver for receiving low-earth orbit (LEO) communication satellite timing signals may comprise receiving a medium Earth orbit (MEO) satellite signal and/or a LEO signal in a receiver of the communication device. The MEO or LEO signal may be down-converted, and a position of the communication device may be calculated utilizing the down-converted signal. The signal may be down-converted utilizing a local oscillator signal generated by a phase locked loop (PLL), which may be delta-sigma modulated via a fractional-N divider. A clock signal may be communicated to the PLL utilizing a temperature-compensated crystal oscillator. The signal may be down-converted to an intermediate frequency or down-converted directly to baseband frequencies. The signal may be processed utilizing surface acoustic wave (SAW) filters. In-phase and quadrature signals may be processed in the RF path utilizing a two-stage polyphase filter.

Method and system for repurposing of a global navigation satellite system receiver for receiving low-earth orbit communication satellite signals

Methods and systems for a dual mode global navigation satellite system may comprise selectively enabling a medium Earth orbit (MEO) radio frequency (RF) path and a low Earth orbit (LEO) RF path in a wireless communication device to receive RF satellite signals. The signals may be processed to determine a position of the wireless device. The signals may be digitized and buffered before further processing. The RF paths may be time-division duplexed by the selective enabling of the MEO and LEO paths. Acquisition and tracking modules in the MEO RF path may be blanked when the LEO RF path is enabled. The MEO RF path may be powered down when the LEO RF path is enabled. The signals may be down-converted to an intermediate frequency before down-converting to baseband frequencies or may be down-converted directly to baseband frequencies. In-phase and quadrature signals may be processed.

Method and system for a dual mode global navigation satellite system

Methods and systems for femtocell positioning using low Earth orbit (LEO) satellite signals may comprise receiving LEO RF satellite signals utilizing a LEO satellite signal receiver path when medium Earth orbit (MEO) signals are attenuated below a threshold needed for positioning purposes. A position of said wireless communication device (WCD) may be measured based on the received LEO RF satellite signals. The measured position of the WCD may be compared to a threshold radius defined by a stored initial position. Wireless communication services to the other WCDs may be enabled when the measured position is within the threshold radius. Reentry of the stored initial position may be requested when the measured position is outside of the threshold radius. The WCD may be disabled when the measured position of the WCD falls outside of the threshold radius more than a predetermined number of times.

Method and system for femtocell positioning using low earth orbit satellite signals

Methods and systems for power optimization of a global navigation satellite system may comprise receiving LEO RF satellite signals utilizing a LEO satellite signal receiver path (LEO Rx) in a wireless communication device (WCD). Circuitry in the LEO Rx may be configured in a powered down state based on a sleep schedule. A location of the wireless communication device may be determined utilizing LEO signals received by the LEO Rx. The sleep schedule may be based on a desired accuracy of the determined location, the relative strengths of signals received from a plurality of LEO satellites, a relevance factor generated by a position engine and communicated to the sort module, or a desired power level of the WCD. The relative strengths of received signals may be compared utilizing a sort module in a LEO demodulator in the LEO satellite signal receiver path.

Method and system for power optimization for a global navigation satellite system

Methods and systems for a dual mode global navigation satellite system may comprise selectively enabling a medium Earth orbit (MEO) radio frequency (RF) path and a low Earth orbit (LEO) RF path in a wireless communication device to receive RF satellite signals. The signals may be down-converted to determine a position of the wireless device. The signals may be down-converted utilizing local oscillator signals from a phase locked loop (PLL). The RF paths may be time-division duplexed by the selective enabling of the MEO and LEO paths. Acquisition and tracking modules in the MEO RF path may be blanked when the LEO RF path is enabled. The MEO RF path may be powered down when the LEO RF path is enabled. The signals may be down-converted to an intermediate frequency before down-converting to baseband frequencies or may be down-converted directly to baseband frequencies. In-phase and quadrature signals may be processed.

Methods and systems for global positioning navigate satellite system configuration of wireless communication applications may comprise in a wireless communication device (WCD) comprising a satellite positioning RF path, determining a location of the WCD utilizing LEO signals received by said satellite positioning RF path, establishing communications with a wireless access point based on the determined location, and configuring a wireless communication function of the WCD based on the determined location. The wireless communication function may comprise a power level of wireless local area network circuitry in the WCD, a point-of-sale transaction, or a synchronization of data on the WCD with one or more devices in a home location of the WCD. The determined location and a transaction ID for the point-of-sale transaction may be stored utilizing a security processor in the WCD. The satellite positioning RF path may be powered down based on the determined location.

Method and system for global navigation satellite system configuration of wireless communication applications

Methods and systems for femtocell positioning using low Earth orbit (LEO) satellite signals may comprise receiving LEO RF satellite signals utilizing a LEO satellite signal receiver path when medium Earth orbit (MEO) signals are attenuated below a threshold needed for positioning purposes by the MEO receiver path. A position of said wireless communication device (WCD) may be measured based on the received LEO RF satellite signals. The measured position of the WCD may be compared to a threshold radius defined by a stored initial position. Wireless communication services to the other WCDs may be enabled when the measured position is within the threshold radius. Reentry of the stored initial position may be requested when the measured position is outside of the threshold radius. The WCD may be disabled when the measured position of the WCD falls outside of the threshold radius more than a predetermined number of times.

Methods and systems for indoor global navigation satellite system detection utilizing low Earth orbit satellite signals may comprise receiving low Earth orbit (LEO) RF satellite signals utilizing a LEO satellite signal receiver path (LEO Rx) in a wireless communication device comprising the LEO satellite signal receiver path and a medium Earth orbit satellite signal receiver path (MEO Rx). A received signal strength indicator (RSSI) may be measured for the received LEO signals and an expected received MEO signal strength may be calculated. A power level of the MEO Rx may be configured based on the calculated MEO signal strength by powering down when the calculated expected MEO signal strength is below a threshold level for MEO positioning purposes and/or powered up when it increases above the threshold level. The RSSI may be measured at a plurality of points along the LEO Rx.

Method and system for indoor global navigation satellite system detection utilizing low-earth orbit satellite signals

Methods and systems for repurposing of a global navigation satellite system receiver for receiving low-earth orbit (LEO) communication satellite timing signals may comprise receiving medium Earth orbit (MEO) satellite signals and/or LEO signals in a receiver of the communication device. A radio frequency (RF) path may be configured to down-convert either of the signals, and a position of the communication device may be calculated utilizing the down-converted signals. The signals may be down-converted utilizing a local oscillator signal generated by a phase locked loop (PLL), which may be delta-sigma modulated via a fractional-N divider. A clock signal may be communicated to the PLL utilizing a temperature-compensated crystal oscillator. The signals may be down-converted to an intermediate frequency or down-converted directly to baseband frequencies. The signals may be processed utilizing surface acoustic wave (SAW) filters. In-phase and quadrature signals may be processed in the RF path utilizing a two-stage polyphase filter.

Methods and systems for femtocell positioning using low Earth orbit (LEO) satellite signals may comprise receiving an initial position of a wireless communication device (WCD) as entered by as user, service provider, or manufacturer, wherein the WCD comprises a LEO satellite signal receiver path (Rx). The WCD may be operable to provide wireless communication services to other WCDs. LEO signals may be received for determining a position of the WCD, which may be compared to a threshold radius defined by the initial position. The communication services may be enabled when the measured position is within the threshold radius. The WCD may comprise a femtocell device, a WiFi access point, or may provide cellular telephone service to the other WCDs. The position of the WCD may be measured upon powering up of the WCD, on a periodic basis, and/or when one or more motion sensors in the WCD detect motion.

Methods and systems for global navigation satellite system configuration of wireless communication applications may comprise determining a location of a wireless communication device (WCD) comprising a medium Earth orbit (MEO) radio frequency (RF) path and a low Earth orbit (LEO) RF path utilizing received LEO signals. A wireless function of the WCD may be configured based on the location, and may comprise a power level of WiFi circuitry in the WCD. The determined location and a transaction ID for the POS transaction may be stored utilizing a security processor. The MEO RF path may be powered down based on the determined location. The wireless function may comprise a synchronization of data on the WCD with devices in a home location. The WCD may comprise a femtocell device or a set-top box, and may be controlled by a reduced instruction set computing (RISC) central processing unit (CPU).

Detecting a wireless device is disclosed. A situation in a wireless medium is created for the wireless device to transmit. A transmission of the wireless device is received. The wireless device is detected based at least in part on information associated with the received transmission of the wireless device.

Creation of environments to detect wireless devices

A method of improving frequency diversity of a signal that includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols comprises receiving an input data sequence, mapping the input data sequence to a transmission data sequence, wherein the mapping includes performing a mapping operation and generating an OFDM symbol using the transmission data sequence. An orthogonal frequency division multiplexing (OFDM) transmitter comprises an interface configured to receive an input data sequence, and a processor configured to perform a mapping operation, to map the input data sequence to a transmission data sequence wherein the mapping includes performing the mapping operation, and to generate an OFDM symbol using the transmission data sequence.

MB-OFDM transmitter and receiver and signal processing method thereof

A configurable Orthogonal Frequency Division Multiplexing (OFDM) device comprises a first transform stage configured to generate a first stage output having a first length, a second transform stage configured to operate in conjunction with the first transform stage and to generate a second stage output having a second length, and a switching network configured to selectively connect the second transform stage with the first transform stage to select the first stage output or the second stage output. A method of configuring an Orthogonal Frequency Division Multiplexing (OFDM) device comprises determining an appropriate OFDM mode, based on the OFDM mode determined, selectively connecting a first transform stage of the device with a second transform stage of the device, wherein the first transform stage has a first stage output and the second transform stage has a second stage output, and selecting the first stage output or the second stage output.

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San Diego, CA, United States of America

Nishant Kumar