公开(公告)号：US11171685B2

公开(公告)日：2021-11-09

申请号：US16788528

申请日：2020-02-12

Applicant: Apple Inc.

Inventor： Joachim S. Hammerschmidt ,  Eren Sasoglu

IPC: H04B1/717 ,  H04L25/03 ,  H04W64/00 ,  G01S13/02 ,  G01S13/76 ,  H04B1/7163

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.

公开(公告)号：US20210064380A1

公开(公告)日：2021-03-04

申请号：US16557357

申请日：2019-08-30

Applicant: Apple Inc.

Inventor： Tao Mai ,  Robert G. Lorenz ,  Joachim S. Hammerschmidt ,  Utku Seckin

IPC: G06F9/38 ,  G06F9/30 ,  G06F1/08 ,  G06F17/16

Abstract: A digital filter according to the disclosure includes a processing circuit having a memory and a number of parallel processing circuits. The parallel processing circuits perform a convolution operations based on input data and function data that is accessed from the memory. The filter further includes a serializer for serializing data that is received from the processing circuits. A clock generator circuit provides a first clock signal to the processing circuit and a second clock signal to the serializer. The frequency of the second clock signal is greater than that of the first clock signal.

公开(公告)号：US20210058169A1

公开(公告)日：2021-02-25

申请号：US16788209

申请日：2020-02-11

Applicant: Apple Inc.

Inventor： Celalettin U. Bas ,  Joachim S. Hammerschmidt ,  Ming Lei ,  Pengcheng Zhan

IPC: H04B17/21 ,  H04B17/318 ,  H04B7/08 ,  H04W68/00 ,  H01Q3/24 ,  H01Q1/24 ,  H01Q21/28

Abstract: Techniques are disclosed for detecting obstruction of a device's antenna(s) and then changing an operation of the device. A transmission time at which an antenna of an electronic device transmitted a signal can be identified. A response signal can be detected that was received at a receiver of the electronic device subsequent to the transmission time. Based on the response signal and on the transmission time, one or more response-signal characteristics can be determined. Based on the one or more response-signal characteristics, it can be determined that the antenna or that another antenna of the electronic device is at least partly blocked from emitting or receiving signals. In response to determining that the antenna is at least partly blocked, a changed type of operation of operation can be identified, and the changed type of operation can be performed.

公开(公告)号：US10749568B2

公开(公告)日：2020-08-18

申请号：US15674397

申请日：2017-08-10

Applicant: Apple Inc.

Inventor： Joachim S. Hammerschmidt ,  Robert G. Lorenz ,  Tad J. Dreier

IPC: H04B1/7156 ,  H04W72/04 ,  H04W4/80 ,  H04B1/713

Abstract: An electronic device that communicates with a second electronic device using adaptive frequency hopping across different spectral bands is described. An integrated circuit in the electronic device includes processing logic that determines an adaptive spectral map that specifies channels across multiple spectral bands. During communication with a second electronic device that includes a second integrated circuit using a communication protocol (such as Bluetooth or Bluetooth Low Energy), the integrated circuit selects channels in the adaptive spectral map, where selection can be based on a predefined frequency-hopping sequence.

公开(公告)号：US10567034B2

公开(公告)日：2020-02-18

申请号：US16229746

申请日：2018-12-21

Applicant: Apple Inc.

Inventor： Joachim S. Hammerschmidt ,  Eren Sasoglu

IPC: H04B1/71 ,  H04B1/717 ,  H04L25/03 ,  H04W64/00 ,  G01S13/02 ,  G01S13/76 ,  H04B1/7163

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.