Qualcomm Incorporated

Ess Technology, Inc.

Csr Technology Inc.

Zoran Corporation

Microtune (texas), Inc.

Jordan C Cookman

Ping Dong

Krishnaranjan Rao

Liang Zhao

Jeffrey Wong

Angelica Wong

Tao Yu

Guttorm Ringstad Opshaug

Jie Wu

Chang Shik Row

Daniel Carolin

Gengsheng Zhang

Rayman Wai Pon

Daniel Fred Filipovic

Mukesh Kumar

Sriram Mudulodu

David Tuck

David Loweth Winslow

Deepika Srinivasan

Jean-Pierre Raffegeau

Sandeep Padmanabhan

Ju-Yong Do

Arnold Jason Gum

Mangesh M Chansarkar

Bala Ramasamy

Siddhant

Duong Hoang

Robert Thrasher

Pulkit Rajgadiya

Mohammed Tawashi

Shikha Jain

Jignesh U Doshi

Fnu Siddhant

Junjie Qu

Cai-Zhang Zhou

Systems and techniques are provided for performing Quasi-Zenith Satellite System (QZSS) signal acquisition. For example, an example of a method for performing QZSS signal acquisition includes obtaining a modulated message signal using a frequency band and generating, based on an estimated set of signal acquisition parameters associated with an acquired signal, an energy grid of correlation codes. A series of extracted data bytes can be generated for each respective hypothesis of a plurality of hypotheses, based on a location of a peak energy within the energy grid of correlation codes. A correct hypothesis out of the plurality of hypotheses can be determined, wherein the correct hypothesis is associated with a generated series of extracted data bytes that includes a pre-determined header preamble pattern. The modulated message signal can be decoded using an initial code phase associated with the correct hypothesis.

Systems and techniques for quasi-zenith satellite system (QZSS) signal acquisition

An apparatus includes: a transceiver configured to receive a satellite signal and to transmit one or more outbound signals; a memory; and a processor, communicatively coupled to the transceiver and the memory, configured to: transmit, via the transceiver, the one or more outbound signals; blank a first portion of the satellite signal spanning a first frequency set that includes at least a portion of an interference signal corresponding to transmission of the one or more outbound signals by the transceiver; and process a second portion of the satellite signal spanning a second frequency set that includes no frequencies of the interference signal; wherein the first frequency set and the second frequency set are different frequency portions of a same time portion of the satellite signal.

Selective satellite signal measurement

Disclosed herein are techniques for managing concurrent reception of satellite position signals and transmission of wireless network signals. In some embodiments, a measurement engine is configured to generate measurements based on Global Navigation Satellite System (GNSS) signals received by a GNSS wireless receiver, including a first measurement based on a first GNSS signal. A determination is made as to whether a wireless transmitter is active in a first frequency band when the GNSS wireless receiver receives the first GNSS signal, where the first frequency band is a frequency band of the first GNSS signal. In response to a determination that the wireless transmitter is active in the first frequency band when the GNSS wireless receiver receives the first GNSS signal, a position calculation operation and/or a clock bias calculation operation can be performed using measurements other than the first measurement.

Management of concurrent GNSS reception and wireless transmission

Disclosed are techniques for oscillator frequency error estimation. In an aspect, an electronic device receives, from a power management integrated circuit (PMIC), a plurality of temperature measurements of an oscillator of the electronic device, determines a temperature noise level estimate of the oscillator based on the plurality of temperature measurements, determines, based on the temperature noise level estimate, a set of parameters for determining a frequency error estimate of the oscillator, and determines the frequency error estimate of the oscillator based on the set of parameters.

Adaptive oscillator frequency error estimation based on oscillator temperature noise level

A jamming signal detection control method includes: receiving, at a satellite positioning signal receiver, one or more satellite positioning signals; determining, at the satellite positioning signal receiver, one or more quality metric values based on the one or more satellite positioning signals; determining, at the satellite positioning signal receiver, whether the one or more quality metric values are indicative of jamming; and activating, at the satellite positioning signal receiver and in response to the one or more quality metric values being indicative of jamming, a jammer detection technique to determine whether a jamming signal is received by the satellite positioning signal receiver.

Qualified jamming signal detection

A mobile device may be configured to perform concurrent Satellite Positioning System (SPS) operation and wireless communications when uplink signals transmitted by the mobile device interferes with the reception of SPS signals in one or more frequency bands. The mobile device may determine if the SPS receiver has already acquired SPS signals and is in a tracking state. If the SPS receiver is not in a tracking state, an SPS acquisition procedure is initiated before the wireless communication session is initiated. The SPS acquisition procedure is performed until the SPS receiver reaches a tracking state, or until a timeout is reached. Once the SPS receiver is in a tracking state, the wireless communication session may be initiated, during which the SPS receiver is controlled, e.g., to perform signal blanking, measurement exclusion, or disable SPS reception, to mitigate interference with SPS signals.

Concurrent operation of SPS receiver and wireless transmitter

In some implementations, an apparatus may receive a request for the Global Navigation Satellite System (GNSS) position fix information. The request may include an accuracy requirement. The apparatus may determine a set of GNSS bands to use to determine the GNSS position fix information. The set of GNSS bands may comprise one or more bands from a plurality of available GNSS bands, and determining the set of GNSS bands to use may be based at least in part on the accuracy requirement. The apparatus may determine the GNSS position fix information based at least in part on GNSS signals received via the selected set of GNSS bands. The apparatus may provide the GNSS position fix information (e.g., to an application processor). The GNSS position fix information may comprise a GNSS position fix, pseudorange information, or both.

Accuracy-based GNSS band selection

A mobile device may be configured to improve measurement of carrier phase (CP) in received satellite signals for satellite positioning system (SPS) operations. For example, this may enable an SPS receiver to measure CP of at least a first positioning signal and a second positioning signal each received from the same satellite vehicle. A corrected CP of the first positioning signal may be estimated based on the measured CP of the first positioning signal and on the measured CP of the second positioning signal.

Methods and apparatus for improving carrier phase detection in satellite positioning system signals

In conditions in which Global Navigation Satellite System (GNSS) signal spoofing is likely occurring, a GNSS receiver may be operated in a reduced operational state with respect to one or more GNSS bands that are likely being spoofed. According to embodiments, a reduced operational state with regard to a GNSS band may comprise performing one or more of the following functions with respect to that GNSS band: disabling data demodulation and decoding, disabling time setting (e.g., time of week (TOW), week number, etc.) disabling acquisition of unknown/not visible satellites, disabling satellite differences, disabling error recovery, reducing non-coherent integration time, and duty cycling the power for one or more receiver blocks associated with the GNSS band.

Global navigation satellite system (GNSS) receiver operation during spoofing

A satellite signal method includes: receiving a satellite signal at an apparatus; transmitting, from the apparatus, one or more outbound signals; and inhibiting processing, by the apparatus, of at least a first portion of the satellite signal spanning a first frequency set that includes at least a portion of an interference signal corresponding to transmission of the one or more outbound signals.

A wireless communication system includes: a first sub-system including a first radio and a second radio, each including a transceiver or a receiver; and a second sub-system coupled to the first sub-system and including: a first antenna configured to convey signals; a first tuner coupled to the first antenna; and a controller coupled to the first tuner, the controller being configured to cause the first tuner to adjust a characteristic of the first tuner; where the controller and/or the first tuner is configured to provide, to the first sub-system, an indication of an effect on operational performance of a portion of the second sub-system coupled to the second radio based on operation of the first tuner or the first antenna, or a combination thereof; where the first sub-system is configured to modify operation of the second radio based on the indication of the effect on operational performance.

Radio control based on operational performance feedback

A method for inhibiting jammed signal use includes: receiving a desired signal wirelessly at a receiver; receiving an undesired signal wirelessly at the receiver, the undesired signal varying in strength over time; and inhibiting measurement of the desired signal, or use of a measurement of the desired signal, based on a determination that the undesired signal is a jamming signal based on a variation of the undesired signal being indicative of jamming.

Unstable jamming signal detection

An apparatus control method includes: controlling a first frequency band receive chain, of an apparatus, to alternate being on and off with a first duty cycle, the first frequency band receive chain being configured to measure satellite signals within a first frequency band; determining one or more performance criteria; and controlling, based on the one or more performance criteria, a second frequency band receive chain, of the apparatus, to alternate being on and off with a second duty cycle, the second frequency band receive chain being configured to measure satellite signals within a second frequency band.

Dynamic radio frequency receive chain control

Techniques are provided for utilizing notch filters to overcome narrowband jamming. An example method for determining a range to a satellite vehicle with a receiver includes receiving a signal from the satellite vehicle, determining one or more notch filter configurations, determining a pseudorandom noise code and a doppler frequency associated with the signal, determining a codephase correction value based at least on the one or more notch filter configurations, the pseudorandom noise code and the doppler frequency, and computing the range to the satellite vehicle based at least in part on the signal and the codephase correction value.

Notch filter codephase impact mitigation

In some aspects, a mobile device is configured to obtain a set of satellite signal measurements through measuring, for each satellite in a first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band. The first plurality of satellites can include at least a first satellite, a second satellite, and a third satellite. The mobile device can determine that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite (e.g., the first satellite, the second satellite, or the third satellite) and a measurement of the second signal from the particular satellite. A position of the mobile device can then be determined based on non-impaired measurements in the set of satellite signal measurements.

Growing community of inventors

Palo Alto, CA, United States of America

Jordan C Cookman