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公开(公告)号：US12111407B2
公开(公告)日：2024-10-08
申请号：US17024874
申请日：2020-09-18
Applicant: Silicon Laboratories Inc.
Inventor： Lauri Mikael Hintsala
CPC classification number: G01S5/0215 , G01S5/0018 , G01S5/021 , G01S5/08 , H04L1/08 , H04W56/001 , H04W72/0446 , H04W4/80
Abstract: A system having a locator device and a plurality of tag devices is disclosed. The locator device comprises an antenna array allowing it to determine an angle of arrival for incoming signals from each of the plurality of tag devices. The system also defines a sequence of time slots, where each time slot has a specific function. The sequence may start with a locator time slot, where the locator device transmits a packet that informs all of the tag devices that this is the start of the sequence. A sync slot follows the locator time slot, where new tag devices may transmit a sync request to the locator device. Upon receipt of a sync request, the locator device assigns the new tag device a tag slot. Following the sync slot are a plurality of tag slots, where each tag device transmits an AoA packet during its assigned tag slot.
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公开(公告)号：US20240302522A1
公开(公告)日：2024-09-12
申请号：US18605170
申请日：2024-03-14
Applicant: Automaton, Inc.
Inventor： Spencer Hewett
CPC classification number: G01S13/74 , G01S5/0215 , G01S5/0263 , G01S11/026 , G01S2013/462 , G01S2013/466 , G01S2013/468 , G01S13/867
Abstract: A system and method for locating radio-frequency identification tags within a predetermined area. The method can incorporate sub-threshold superposition response mapping techniques, alone, or in combination with other methods for locating radio-frequency identification tags such as but not limited to time differential on arrival (TDOA), frequency domain phase difference on arrival (FD-PDOA), and radio signal strength indication (RSSI). The system can include a plurality of antennas dispersed in a predefined area; one or more radio-frequency identification tags; a radio-frequency transceiver in communication with said antennas; a phase modulator coupled to the radio-frequency transceiver; and a system controller in communication with said transceiver and said phase modulator. Calibration techniques can be employed to map constructive interference zones for improved accuracy.
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公开(公告)号：US20240118366A1
公开(公告)日：2024-04-11
申请号：US18546018
申请日：2021-04-01
Applicant: QUALCOMM Incorporated
Inventor： Yuwei REN , Weimin DUAN , Huilin XU
CPC classification number: G01S5/0215 , G01S5/06
Abstract: Disclosed are techniques for wireless positioning. In an aspect, a first network node receives, from a second network node, a positioning reference signal having a first reception time at the first network node, receives, from a first user equipment (UE), a first uplink positioning reference signal having a second reception time at the first network node, receives, from a second UE, a second uplink positioning reference signal having a third reception time at the first network node, and enables a first reference signal time difference (RSTD) measurement to be calculated for the first UE and a second RSTD measurement to be calculated for the second UE based on the first reception time, the second reception time, the third reception time, and other measurements.
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公开(公告)号：US11778584B2
公开(公告)日：2023-10-03
申请号：US16729104
申请日：2019-12-27
Applicant: Intel Corporation
Inventor： Jeongsik Choi , Yang-Seok Choi
CPC classification number: H04W64/006 , G01S5/0215 , H04B1/16 , H04W84/12
Abstract: Methods, apparatuses, and computer readable media for parameter update for range-based positioning. An apparatus of a station (STA) for parameter update for range-based positioning, the apparatus including processing circuitry configured to perform a distance estimating method with access points (APs) to determine distance estimates between the APs and the STA, the distant estimating method including parameters, and configured to determine a location of the STA based on the distance estimates between the APs and the STAs and locations of the APs. The processing circuitry further configured to: update the parameters by subtracting from a parameter of the parameters a learning rate times a derivative of a cost function with respect to the parameter, where the cost function is based on the determined location of the STA, the locations of the APs, and the distance estimates between the APs and the STA.
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公开(公告)号：US11733344B2
公开(公告)日：2023-08-22
申请号：US16973408
申请日：2019-05-21
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kohei Suzaki , Ryo Miyatake , Yusuke Asai , Hiroyuki Shiba
IPC: G01S5/02 , H04B17/27 , H04B17/345 , G06T7/246 , G01S5/00
CPC classification number: G01S5/0278 , G01S5/02 , G01S5/0215 , G06T7/246 , H04B17/27 , H04B17/345 , G01S5/011 , G06T2207/30192
Abstract: An interference source hunting method of hunting for an interference source of electromagnetic waves while moving between multiple measurement points, includes the steps of acquiring strength information of electromagnetic waves, estimating a distance from the measurement point to the location of the interference source, based on the strength information, calculating a first presence probability that the interference source is present at each position, based on whether a distance from the measurement point to the position is within the distance, updating second presence probabilities acquired in hunting in the past, based on the first presence probabilities, determining a position obtained by moving, by a predetermined distance, the measurement point toward a position with the second presence probability higher than the second presence probability at the measurement point, as a new measurement point, and determining, in a case where a size of an area in which each of the second presence probabilities is greater than or equal to a predetermined value is less than a predetermined value, that the location of the interference source is within the area.
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Patent Agency Ranking
公开(公告)号：US11726163B2
公开(公告)日：2023-08-15
申请号：US16323444
申请日：2017-08-10
Applicant: Nokia Technologies Oy
Inventor： Zhilan Xiong , David Bhatoolaul
CPC classification number: G01S5/0215 , G01S1/0423 , G01S1/20 , H04B1/713 , H04W64/00
Abstract: The position detection of user equipment within a network, and the corresponding methods performed at the network node, user equipment and location server are disclosed, along with these entities and a computer program. The method performed at the network node comprises within a position reference signal time period, broadcasting: a first position reference signal within a first frequency band and during a first time period; and at least one further position reference signal within at least one further frequency band and during at least one subsequent time period, said at least one further frequency band being different to said first frequency band.
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公开(公告)号：US20230176168A1
公开(公告)日：2023-06-08
申请号：US17975442
申请日：2022-10-27
Applicant: DC-001, Inc. dba Spartan Radar
Inventor： Scott Bergen
IPC: G01S5/02
CPC classification number: G01S5/0215 , G01S5/0231 , G01S5/021 , G01S5/0263 , G01S5/0264 , G01S5/0242 , G01S2205/03
Abstract: The present disclosure generally pertains to systems and methods for autonomously detecting and correcting anomalies in position information provided to aircraft using radio-frequency signals. By enabling autonomously detecting and correcting for anomalies in the operation of a ground-based solution entirely independent of GPS, systems of the present disclosure can make the provided position information more accurate and robust, thereby enhancing the effectiveness and safety of navigation systems using the provided position information. More precisely, systems of the present disclosure may employ a series of ground-based beacon transmitters to provide radio-frequency (RF) signal pulse with a highly regular frequency. A locating receiver can detect the arrival times of these pulses and use this information to detect and report certain anomalies. These reports may then be used to autonomously correct the detected anomalies.
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公开(公告)号：US20180313930A1
公开(公告)日：2018-11-01
申请号：US16027785
申请日：2018-07-05
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: G01S5/06 , H04L27/26 , G01S5/02 , G01S11/02 , H04B17/336
CPC classification number: G01S5/06 , G01S5/0215 , G01S5/0221 , G01S5/0252 , G01S11/02 , H04B17/336 , H04L27/2628
Abstract: A technique is provided for estimating time of arrival of a signal transmitted as a pulse and received as a sum of pulses. The received signal is filtered with a novel filter that lowers the early side lobes of the received signal to noise level. A first energy rise point is identified at a point of the main lobe of the filtered received signal, at which the energy is higher than the noise by a predetermined level. Starting from the identification of the first energy rise points, the time of arrival is estimated via curve matching, in which the shape of the filtered received signal is matched to the shape of a reference curve composed by a sum of one or more reference curves that are shifted both in time and in energy. The reference curves are found by applying to the transmitted signal the same filter applied to the received signal.
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公开(公告)号：US20180299529A1
公开(公告)日：2018-10-18
申请号：US15947604
申请日：2018-04-06
Applicant: Wireless Applications Corp.
Inventor： Eric Wills , Abdelelah Salama
CPC classification number: G01S5/021 , G01S5/0215 , G06G7/78 , H04B17/27 , H04B17/3912 , H04W16/18 , H04W24/10
Abstract: A radio signal path design tool that allows radio link propagation path profiling or path-loss measurement where the link partner antenna towers are located in a proposed fixed location on the earth's surface, but are extendable a certain distance in any direction from the fixed location. The design tool can be used to compute a radio link path profile at the proposed tower location, while still correctly representing terrain variations in a variable path extension distance on either side of the radio link. To correctly represent terrain variations across the depicted portion of the earth's surface, the tool computes and applies a modified earth-bulge factor or k-factor. The variable extension distance on either side of the radio link allows for latitudinal and/or longitudinal variations in antenna tower placement, greatly facilitating the identification of appropriate positions of antenna towers during the wireless link design phase.
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公开(公告)号：US10085120B1
公开(公告)日：2018-09-25
申请号：US15813373
申请日：2017-11-15
Inventor： Matthew C. Bromberg
CPC classification number: H04W4/023 , G01S5/0215 , G01S5/0278 , H04B17/12 , H04B17/21 , H04B17/27 , H04W84/005
Abstract: The system and method of copy aided geolocation in a cochannel environment. The plurality of emitter signals are detected using a multichannel antenna array, separated into subbands based on frequency ranges using a channelizer, and are further processed using copy weights, property restoral algorithms, and maximum likelihood calculations. The multichannel antenna array may be mounted to a mobile platform and the calculations may assume that the signal of interest is non-Gaussian, but the remainder of emitter signals is combined into another signal that is assumed to be Gaussian. The method and system provides geolocation results that adhere to the Cramer-Rao bound.
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