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公开(公告)号：US20190007093A1
公开(公告)日：2019-01-03
申请号：US15681968
申请日：2017-08-21
Applicant: Apple Inc.
Inventor： Joachim S. HAMMERSCHMIDT , Eren SASOGLU
Abstract: Embodiments enable communicating Ultra Wideband (UWB) devices to collaborate by exchanging pulse shape information. The UWB devices use the pulse shape information to improve ranging accuracy. The improved ranging accuracy can be used in complex multipath environments where advanced estimation schemes are used to extract an arriving path for time-of-flight estimation. To determine the pulse shape information to be shared, some embodiments include determining location information of a UWB device and selecting the pulse shape information that satisfies regional aspects. The pulse shape information includes a time-zero index specific to a ranging signal that is used by UWB receivers to establish timestamps time-of-flight calculations. Some embodiments include measuring performance characteristics and selecting different pulse shape information based on the performance characteristics for improved accuracy.
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公开(公告)号：US20220337297A1
公开(公告)日：2022-10-20
申请号：US17825906
申请日：2022-05-26
Applicant: Apple Inc.
Inventor： Oner ORHAN , Brent ELLIOTT , Hosein NIKOPOUR , Eren SASOGLU , Shilpa TALWAR
IPC: H04B7/06 , H04B1/44 , H04B7/0456
Abstract: An apparatus, method and computer readable medium for special thermal density reduction by antenna thinning. A system comprises N transmit/receive (TX/RX) chains, where each TX/RX chain comprises an RFFE and each RFFE comprises one or more thermal sensors configured to measure heat in the RFFE. An antenna array coupled to the plurality of TX/RX chains. A codebook that comprises a plurality of code words configured to respond to real-time heat measurements from the thermal sensors in each TX/RX chain is configured to switch off selected TX/RX chains to reduce thermal density at the antenna array while maintaining M RFFEs switched on, where M
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Patent Agency Ranking
公开(公告)号：US20190199398A1
公开(公告)日：2019-06-27
申请号：US16229746
申请日：2018-12-21
Applicant: Apple Inc.
Inventor： Joachim S. HAMMERSCHMIDT , Eren SASOGLU
Abstract: Embodiments enable communicating Ultra Wideband (UWB) devices to collaborate by exchanging pulse shape information. The UWB devices use the pulse shape information to improve ranging accuracy. The improved ranging accuracy can be used in complex multipath environments where advanced estimation schemes are used to extract an arriving path for time-of-flight estimation. To determine the pulse shape information to be shared, some embodiments include determining location information of a UWB device and selecting the pulse shape information that satisfies regional aspects. The pulse shape information includes a time-zero index specific to a ranging signal that is used by UWB receivers to establish timestamps time-of-flight calculations. Some embodiments include measuring performance characteristics and selecting different pulse shape information based on the performance characteristics for improved accuracy.
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公开(公告)号：US20200259522A1
公开(公告)日：2020-08-13
申请号：US16788528
申请日：2020-02-12
Applicant: Apple Inc.
Inventor： Joachim S. HAMMERSCHMIDT , Eren SASOGLU
Abstract: Some embodiments include a system and method for enabling communicating Ultra Wideband (UWB) devices to collaborate by exchanging pulse shape information. The UWB devices use the pulse shape information to improve ranging accuracy. The improved ranging accuracy can be used in complex multipath environments where advanced estimation schemes are used to extract an arriving path for time-of-flight estimation. To determine the pulse shape information to be shared, some embodiments include determining location information of a UWB device and selecting the pulse shape information that satisfies regional aspects. The pulse shape information includes a time-zero index specific to a ranging signal that is used by UWB receivers to establish timestamps time-of-flight calculations. Some embodiments include measuring performance characteristics and selecting different pulse shape information based on the performance characteristics for improved accuracy.
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公开(公告)号：US20190273636A1
公开(公告)日：2019-09-05
申请号：US16291973
申请日：2019-03-04
Applicant: Apple Inc.
Inventor： Anuj BATRA , Joachim S. HAMMERSCHMIDT , Eren SASOGLU
Abstract: A secure training sequence (STS) is included in wireless packets communicated between electronic devices to assist with channel estimation and wireless ranging. The STS includes multiple STS segments generated based on outputs from a cryptographically secure pseudo-random number generator (CSPRNG), the STS segments being separated by guard intervals and formatted in accordance with an 802.15.4 data symbol format that uses burst position modulation (BPM) and binary phase shift keying (BPSK) to map bits from the CSPRNG to burst positions and pulse polarities for the STS symbols. Both a first electronic device, which generates the STS, and a second electronic device, which estimates a communication channel using the STS, have prior private knowledge of cryptographic keys required to generate a non-repetitive single-use pseudo-random (PR) sequence by the CSPRNG. The STS includes two burst position intervals per STS symbol and two possible burst positions within each burst position interval.
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公开(公告)号：US20210242915A1
公开(公告)日：2021-08-05
申请号：US17052678
申请日：2018-06-29
Applicant: Apple Inc.
Inventor： Oner ORHAN , Brent ELLIOTT , Hosein NIKOPOUR , Eren SASOGLU , Shilpa TALWAR
IPC: H04B7/06 , H04B7/0456 , H04B1/44
Abstract: An apparatus, method and computer readable medium for special thermal density reduction by antenna thinning. A system comprises N transmit/receive (TX/RX) chains, where each TX/RX chain comprises an RFFE and each RFFE comprises one or more thermal sensors configured to measure heat in the RFFE. An antenna array coupled to the plurality of TX/RX chains. A codebook that comprises a plurality of code words configured to respond to real-time heat measurements from the thermal sensors in each TX/RX chain is configured to switch off selected TX/RX chains to reduce thermal density at the antenna array while maintaining M RFFEs switched on, where M
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公开(公告)号：US20200280952A1
公开(公告)日：2020-09-03
申请号：US16805243
申请日：2020-02-28
Applicant: Apple Inc.
Inventor： Eren SASOGLU , Joachim S. HAMMERSCHMIDT
Abstract: Some embodiments include an apparatus, method, and computer program product for secure time-of-arrivals calculations in an ultra-wideband (UWB) system. Some embodiments include a UWB receiver that can inspect a channel impulse response (CIR) between a first and second electronic device and identify one or more first path candidates (FPCs). For a candidate path, the UWB receiver can identify subsequent paths that create inter-pulse interference (IPI) on the candidate path. Using estimates for the interfering path strengths (e.g., channel coefficients from the CIR) and the known cryptographically sequence of pulse polarities (SPP), the UWB receiver can reduce the IPI from these interfering paths on the FPCs, and then make decisions based at least on the remaining pulse polarities, whether the one or more FPCs comprise a legitimate transmission signal.
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