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    Dynamically estimating a propagation time between a first node and a second node of a wireless network
    93.
    发明授权
    Dynamically estimating a propagation time between a first node and a second node of a wireless network 有权

    公开(公告)号：US11646809B2

    公开(公告)日：2023-05-09

    申请号：US17690995

    申请日：2022-03-09

    Applicant: Skylo Technologies, Inc.

    Inventor： Meghna Agrawal ,  Andrew Nuttall

    IPC: H04J3/06 ,  H04W56/00 ,  H04B17/391 ,  H04B17/364

    CPC classification number: H04J3/0661 ,  H04B17/364 ,  H04B17/391 ,  H04W56/004 ,  H04W56/0065

    Abstract: Apparatuses, methods, and systems for dynamically estimating a propagation time between a first node and a second node of a wireless network are disclosed. One method includes receiving, by the second node, from the first node a packet containing a first timestamp representing the transmit time of the packet, receiving, by the second node, from a local time source, a second timestamp corresponding with a time of reception of the first timestamp received from the first node, calculating a time difference between the first timestamp and the second timestamp, storing the time difference between the first timestamp and the second timestamp, calculating a predictive model for predicting the propagation time based the time difference between the first timestamp and the second timestamp, and estimating the propagation time between the first node and the second node at a time by querying the predictive model with the time.

    Envelope alignment calibration in radio frequency systems
    94.
    发明授权
    Envelope alignment calibration in radio frequency systems 有权

    公开(公告)号：US11626933B2

    公开(公告)日：2023-04-11

    申请号：US17449511

    申请日：2021-09-30

    Applicant: Skyworks Solutions, Inc.

    Inventor： Florinel G. Balteanu ,  Yu Zhu ,  Paul T. DiCarlo

    IPC: H04B17/12 ,  H04B17/21 ,  H04B17/14 ,  H04B17/327 ,  H04B17/364

    Abstract: Apparatus and methods for envelope alignment calibration in radio frequency (RF) systems are provided. In certain embodiments, calibration is performed by providing an envelope signal that is substantially triangular along an envelope path, and by providing an RF signal to a power amplifier along an RF signal path. Additionally, an output of the power amplifier is observed to generate an observation signal using an observation receiver. The observation signal includes a first peak and a second peak, and a delay between the envelope signal and the RF signal is controlled based on relative size of the peaks of the observation signal to one another.

    Average environmental channel estimation
    95.
    发明授权
    Average environmental channel estimation 有权

    公开(公告)号：US11611403B2

    公开(公告)日：2023-03-21

    申请号：US17009502

    申请日：2020-09-01

    Applicant: QUALCOMM Incorporated

    Inventor： Peer Berger ,  Shay Landis ,  Moshe Ben-Ari ,  Amit Bar-Or Tillinger ,  Michael Levitsky ,  Assaf Touboul

    IPC: H04B17/364 ,  H04B17/382 ,  H04L5/00

    Abstract: Methods, systems, and devices for wireless communications are described for estimating one or more environmental factors at a first user equipment (UE). The one or more environmental factors may be based on estimates of a Doppler spread and a power delay profile (PDP) taken over a set of subsets of a time period, based on multiple signals received from a second UE or a base station over the time period. The first UE may estimate the Doppler spread and PDP for a channel over each of the set of subsets of the time period, and may combine the Doppler spread over the set of subsets and combine the PDP over the set of subsets. The first UE may use the combined Doppler spread and the combined PDP to determine one or more communication parameters for the channel.

    Converting Binaural Signals to Stereo Audio Signals
    97.
    发明申请
    Converting Binaural Signals to Stereo Audio Signals 有权

    公开(公告)号：US20220417691A1

    公开(公告)日：2022-12-29

    申请号：US17778454

    申请日：2020-11-13

    Applicant: Nokla Technologies Oy

    Inventor： Mikko-Ville LAITINEN ,  Juha VILKAMO

    IPC: H04S7/00 ,  H04S1/00 ,  H04R1/32 ,  H04B17/364

    Abstract: An apparatus including circuitry configured to: obtain a binaural audio signal; obtain, based on the binaural audio signal, at least one direction parameter of at least one frequency band of the binaural audio signal; process the binaural audio signal to generate at least two audio signals for loudspeaker reproduction by modifying an inter-channel difference of the at least one frequency band of the binaural audio signal based on the at least one direction parameter for the at least one frequency band; and output the at least two audio signals for loudspeaker reproduction.

    System for measuring phase coherence as well as method of measuring phase coherence
    98.
    发明授权
    System for measuring phase coherence as well as method of measuring phase coherence 有权

    公开(公告)号：US11428776B2

    公开(公告)日：2022-08-30

    申请号：US16356673

    申请日：2019-03-18

    Applicant: Rohde & Schwarz GmbH & Co. KG

    Inventor： Thomas Braunstorfinger

    IPC: G01S7/288 ,  H04B17/364 ,  H04B17/23 ,  H04B17/21

    Abstract: A system for measuring phase coherence between two modulated radio frequency signals comprises at least two measurement receivers coupled with each other and a processing module assigned to the at least two measurement receivers. Each of the at least two measurement receivers is configured to acquire a radio frequency signal and to convert the respective radio frequency signal acquired into digital samples. The processing module is configured to receive the digital samples and to transform the digital samples into a frequency domain to obtain a respective transformed dataset assigned to each measurement receiver. The processing module is also configured to calculate a phase in dependency of the frequency from the respective transformed dataset. Moreover, the processing module is configured to determine a phase difference over frequency based on the transformed datasets. Further, a method of measuring phase coherence between two modulated radio frequency signals is described.

    Internet-based time and frequency recovery for position fixing of GNSS receiver
    100.
    发明授权
    Internet-based time and frequency recovery for position fixing of GNSS receiver 有权

    公开(公告)号：US11372111B2

    公开(公告)日：2022-06-28

    申请号：US16933709

    申请日：2020-07-20

    Applicant: iPosi, inc.

    Inventor： Eric Derbez ,  Christopher Neil Kurby ,  Derek Glass

    IPC: H04B7/185 ,  G01S19/25 ,  G01S19/23 ,  G01S19/27 ,  H04L12/433 ,  H04W56/00 ,  H04B17/364 ,  H04B7/26

    Abstract: Determination of one or more timing (phase) and/or frequency corrections to be made to a local time base of a receiver device to synchronize the local time base with the time of GPS or other highly accurate time base. Timing packets from one or more grandmaster devices whose time bases are substantially the same as that of GPS or the like and/or positioning system signals (e.g., GPS signals) directly from a positioning system are received and manipulated to determine the timing and/or frequency corrections. The corrected time base may be used to assist in acquiring such positioning signals to allow for higher accuracy correction and/or for downstream communication operation. The present utilities are advantageous such as when a sufficient number of channels (e.g., four) from the receiver device to positioning system satellites are unavailable to synchronize the local time base to the GPS or other accurate time base.

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