公开(公告)号：US20200067565A1

公开(公告)日：2020-02-27

申请号：US16106354

申请日：2018-08-21

Applicant: Apple Inc.

Inventor： Xiaoming Yu ,  Alejandro J. Marquez ,  Indranil S. Sen ,  Peter M. Agboh ,  Shang-Te Yang ,  Vusthla Sunil Reddy

IPC: H04B1/7103

Abstract: Methods and apparatuses are presented to reduce multiuser interference resulting from two or more overlapping ultra wideband (UWB) transmissions by randomizing the start time of packets and/or bursts within the packets. A random offset time may be generated for a packet, and transmission of the packet may be arbitrarily delayed by that random offset time, relative to an earlier time at which the packet is prepared for transmission. A random offset time may be generated for a pulse burst within a symbol of a packet, and transmission of the burst may be delayed by that random offset time, relative to a nominal transmission window within the symbol. The burst may therefore occupy a portion of a guard period following the nominal transmission window. Either procedure, or both procedures, may be used to reduce multiuser interference between two concurrently transmitted packets by randomizing overlap occurring between the bursts.

公开(公告)号：US11184810B2

公开(公告)日：2021-11-23

申请号：US16540301

申请日：2019-08-14

Applicant: Apple Inc.

Inventor： Vusthla Sunil Reddy ,  Alejandro J. Marquez ,  Indranil S. Sen ,  Manjit S. Walia ,  Peter M. Agboh ,  Shang-Te Yang ,  Xiaoming Yu

IPC: H04W36/00 ,  H04W64/00 ,  H04W36/30 ,  H04W76/15

Abstract: Methods and apparatuses are presented to locate a wireless communication device. A target device may be out of range of a source device for normal ranging communications according to a first radio access technology (RAT), such as ultra wideband (UWB) communications. A source device may therefore modify communications according to the first RAT, to increase the transmit power, while removing the data payload. The target device may utilize the signal strength and angle of arrival of the modified communications to guide the user to move toward the source device, e.g., until the target device is within range to perform normal ranging communications. A second RAT, such as Bluetooth, may be used to communicate between the two devices while the target device is out of range of the first RAT. For example, the target device may use the second RAT to communicate to the source device to start/stop transmitting modified communications.

公开(公告)号：US10958306B2

公开(公告)日：2021-03-23

申请号：US16818191

申请日：2020-03-13

Applicant: Apple Inc.

Inventor： Xiaoming Yu ,  Alejandro J. Marquez ,  Lei Li ,  Peter M. Agboh ,  Shang-Te Yang ,  Vusthla Sunil Reddy ,  Pradeep K. Marri ,  Manjit S. Walia ,  Ali Pourghorban Saghati

IPC: H04B1/7176 ,  H04B1/7163 ,  H04B1/717

Abstract: Some embodiments include a system, method, and computer program product for managing the Ultra Wideband (UWB) systems, especially when the UWB system is collocated with another wireless system (e.g., WiFi) to transmit and/or receive UWB signals with an occupied bandwidth (OBW) that satisfies a UWB OBW standard (e.g., a UWB OBW>=500 MHz.) In some embodiments a TailBit signal (e.g., a periodic signal at a selected frequency) is added to a UWB packet to generate frequency components at the selected frequency that enables the power spectrum of the TailBit UWB signal to satisfy the UWB OBW standard. In some embodiments an altered code sequence is used to generate an altered spread signal, where the altered code sequence reduces or removes a frequency component peak near DC frequency of the power spectrum of an altered UWB signal, resulting in altered UWB OBW that satisfies the UWB OBW standard.

公开(公告)号：US20210051532A1

公开(公告)日：2021-02-18

申请号：US16540301

申请日：2019-08-14

Applicant: Apple Inc.

Inventor： Vusthla Sunil Reddy ,  Alejandro J. Marquez ,  Indranil S. Sen ,  Manjit S. Walia ,  Peter M. Agboh ,  Shang-Te Yang ,  Xiaoming Yu

IPC: H04W36/00 ,  H04W76/15 ,  H04W36/30 ,  H04W64/00

Abstract: Methods and apparatuses are presented to locate a wireless communication device. A target device may be out of range of a source device for normal ranging communications according to a first radio access technology (RAT), such as ultra wideband (UWB) communications. A source device may therefore modify communications according to the first RAT, to increase the transmit power, while removing the data payload. The target device may utilize the signal strength and angle of arrival of the modified communications to guide the user to move toward the source device, e.g., until the target device is within range to perform normal ranging communications. A second RAT, such as Bluetooth, may be used to communicate between the two devices while the target device is out of range of the first RAT. For example, the target device may use the second RAT to communicate to the source device to start/stop transmitting modified communications.