公开(公告)号：US11438786B1

公开(公告)日：2022-09-06

申请号：US16009950

申请日：2018-06-15

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Rongsheng Huang ,  Ravi Ichapurapu ,  Morris Yuanhsiang Hsu ,  Vipul Jain ,  Jungtao Liu

IPC: H04W28/02 ,  H04L43/10 ,  H04W40/12 ,  G06F3/16 ,  H04L45/12 ,  H04W84/12

Abstract: A group of devices connected on a wireless local area network (WLAN) operate in conjunction with one another to present content. Devices in the group may be wirelessly connected via personal area network (PAN) to other devices, such as speakers. An election process is used to select a primary device. The primary device may receive content from an external source, such as a server, and distribute that content to other devices within the group via the WLAN. The parameters of that distribution, such as a content rate indicative of a bitrate of the content, transfer limit rate, and so forth are configured to preserve fidelity of the presentation while minimizing interruptions to presentation that may result due to frequency contention between the WLAN and the PAN, traffic on the WLAN, and so forth.

公开(公告)号：US10581155B1

公开(公告)日：2020-03-03

申请号：US16144743

申请日：2018-09-27

Applicant: Amazon Technologies, Inc.

Inventor： Adrian Gradinaru ,  Morris Yuanhsiang Hsu ,  Cheol Su Kim ,  Jaiyoung Park

IPC: H04B1/38 ,  H01Q1/52 ,  H04B1/40 ,  H04B1/00

Abstract: Antenna structures and methods of operating the same are described. One apparatus includes a processing device that executes an active interference cancellation (AIC) algorithm and radio frequency front-end (RFFE) circuitry coupled to the processing device. The RFFE circuitry includes two RF couplers, a fixed-delay filter, and an interference compensation circuit part of an electrical path between the two RF couplers. The AIC algorithm is operable to control the interference compensation circuit to adjust a phase, an amplitude or both of a copy of a first RF signal transmitted on a first antenna to remove corresponding interference in a second RF signal received at a second antenna that is caused by the first RF signal. The processing device triggers a re-calibration in the AIC algorithm when the digital values, received from a power detector circuit, indicate a change in impedance that exceeds a threshold.

公开(公告)号：US09634776B1

公开(公告)日：2017-04-25

申请号：US14663213

申请日：2015-03-19

Applicant: Amazon Technologies, Inc.

Inventor： Morris Yuanhsiang Hsu ,  Mudit Sunilkumar Khasgiwala ,  Peruvemba Ranganathan Sai Ananthanarayanan

IPC: H04W72/00 ,  H04B17/16 ,  H04W24/10 ,  H04B1/04

CPC classification number: H04B17/16 ,  H04B1/0458 ,  H04B1/0475 ,  H04B17/103 ,  H04B17/13 ,  H04B17/318 ,  H04B2001/0416 ,  H04W24/10

Abstract: A mobile communication device may use sensor data to identify the current device state based on sensor data, device parameter values and/or device usage data. The mobile communication device may then measure the impedance value of a characteristic circuit, such as the antenna or the power amplifier. Responsive to determining that the measured impedance value differs from a pre-defined base impedance value by more than a certain threshold value, the mobile communication device may retrieve, from a memory, a set of envelope tracking (ET) parameter values corresponding to the current state of the communication device and the measured impedance value. The mobile communication device may calculate, using the retrieved ET parameter values, a target supply voltage to be applied to the power amplifier.

公开(公告)号：US08878602B1

公开(公告)日：2014-11-04

申请号：US13797956

申请日：2013-03-12

Applicant: Amazon Technologies, Inc.

Inventor： Morris Yuanhsiang Hsu ,  Chirag Saurabh Bhavsar ,  In Chul Hyun

IPC: H03K5/00 ,  H05K9/00

CPC classification number: H04B3/32

Abstract: Approaches are described for managing effects such as interference, crosstalk, and other types of noise in an electronic environment using a physical and/or electronic switch to improve antenna performance. For example, in the situation where the connector is connected to the device and no data and/or power is being transferred through the connector, the switch is caused to be open. In this situation, because the connector will be an electrically floating metal instead of a grounded metal due to the open switch, at least a portion of the radiated and/or received antenna signals will not couple to the connector. In the situation where the connector is connected to the device and is being used to transfer data and/or power, the switch is caused to be closed, which will result in the connector being grounded. In such a situation, at least a portion of the noise generated by the connector due to transferring data and/or power will be grounded instead of being coupled to the antenna.

Abstract translation: 描述了用于在使用物理和/或电子开关的电子环境中管理诸如干扰，串扰和其他类型的噪声的影响的方法，以改善天线性能。 例如，在连接器连接到设备而没有通过连接器传输数据和/或电力的情况下，开关被打开。 在这种情况下，因为由于打开的开关，连接器将是电浮置的金属而不是接地的金属，所以辐射和/或接收的天线信号的至少一部分将不会连接到连接器。 在连接器连接到设备并用于传输数据和/或电源的情况下，使开关闭合，这将导致连接器接地。 在这种情况下，由于传送数据和/或功率而由连接器产生的噪声的至少一部分将被接地，而不是耦合到天线。