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公开(公告)号：US10454423B1
公开(公告)日：2019-10-22
申请号：US15951946
申请日：2018-04-12
Applicant: Apple Inc.
Inventor： Wassim El-Hassan , Gurusubrahmaniyan Subrahmaniyan Radhakrishnan , Vineet Nayak , Srinivasa Yasasvy Sateesh Bhamidipati , Jaydeep Vijay Ranade
Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which the operating characteristics (e.g., power consumption) of a power amplifier in a transceiver may be regulated according to an operation mode of the transceiver. More specifically, in some embodiments, different LUTs may be employed for each mode of operation to suitably adjust the supply voltage (e.g., bias voltage) and/or quiescent current input to the power amplifier based on an input signal and a margin by which transmission standards are met. Further, in some embodiments, a method to calibrate a LUT for average power tracking and/or envelope tracking in a transceiver mode of operation may be employed to populate a LUT that may be used to suitably adjust the power and/or current consumption of the power amplifier.
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22.发明申请Testing Radio-Frequency Performance of Wireless Communications Circuitry Using Fast Fourier Transforms 审中-公开使用快速傅里叶变换测试无线通信电路的射频性能公开(公告)号：US20140119421A1
公开(公告)日：2014-05-01
申请号：US13663336
申请日：2012-10-29
Applicant: APPLE INC.
Inventor： Wassim El-Hassan
IPC: H04B17/00
CPC classification number: H04B17/29 , H04B17/0085 , H04B17/345
Abstract: A test system for testing wireless circuitry in an electronic device is provided. The test system may include a test host and a tester. The tester may provide radio-frequency test signals to a device under test (DUT). The DUT may include radio-frequency decoding circuitry that processes the test signals using a communications protocol and digital demodulator circuitry that processes the test signals without using the communications protocol. The digital demodulator circuitry may include transformation circuitry that performs fast Fourier transforms on the test signals to create frequency-domain performance data. The test host may compute a noise floor and signal-to-noise ratio based on the frequency-domain performance data. The test host may compare the computed noise floor and signal-to-noise ratio to predetermined thresholds to characterize the radio-frequency performance of the wireless circuitry.
Abstract translation: 提供了一种用于测试电子设备中的无线电路的测试系统。 测试系统可以包括测试主机和测试器。 测试仪可以向被测设备（DUT）提供射频测试信号。 DUT可以包括使用通信协议处理测试信号的射频解码电路和在不使用通信协议的情况下处理测试信号的数字解调器电路。 数字解调器电路可以包括对测试信号执行快速傅里叶变换以创建频域性能数据的变换电路。 测试主机可以基于频域性能数据来计算噪声本底和信噪比。 测试主机可以将计算出的噪声底噪比和信噪比与预定阈值进行比较，以表征无线电路的射频性能。
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公开(公告)号：US20240305318A1
公开(公告)日：2024-09-12
申请号：US18432987
申请日：2024-02-05
Applicant: Apple Inc.
Inventor： Wassim El-Hassan , Brian H. Bremer , Lydi Smaini , Abhinav Dayal , Daphne I. Gorman , Xuefeng Zhao
IPC: H04B1/00
CPC classification number: H04B1/0064 , H04B1/0075
Abstract: A wireless communication includes multiple transceivers that may be utilized for wireless communication over multiple frequency ranges. One of the transceivers is communicatively coupled to antennas that may be utilized to transmit or receive wireless signals having frequencies in different portions of one of the frequency ranges.
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Patent Agency Ranking
公开(公告)号：US11349533B2
公开(公告)日：2022-05-31
申请号：US16145990
申请日：2018-09-28
Applicant: Apple Inc.
IPC: H04B7/0456 , H04B7/06 , H01Q1/22
Abstract: Wireless network interfaces that are capable of transmitting and/or receiving beamformed radiofrequency (RF) signals may be assisted by the use of codebooks. Electronic devices with memory to store a database of codebooks may be used to increase the number of entries available for operation. The database of codebooks may employ environmental parameters to improve efficiency of the wireless network interface. Methods for calibration of electronic devices and/or adjustment and selection of codebooks based on the parameters are also described. The calibration may employ a testing chamber that measure powers at in a limited number of angles.
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公开(公告)号：US20200014472A1
公开(公告)日：2020-01-09
申请号：US16026808
申请日：2018-07-03
Applicant: Apple Inc.
Inventor： Wassim El-Hassan , Yingjie Xu
Abstract: An electronic device may include a feedback circuit that may determine an error of a first signal to be transmitted to a second electronic device. The electronic device may also include a transceiver that may adjust the first signal based on the error and send the adjusted first signal to the second electronic device. The electronic device may also include a coupler circuitry configured to route a second signal received from the second electronic device or a third electronic device to the feedback circuit, such that the feedback circuit may determine one or more properties associated with the second signal.
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公开(公告)号：US20190319583A1
公开(公告)日：2019-10-17
申请号：US15951946
申请日：2018-04-12
Applicant: Apple Inc.
Inventor： Wassim El-Hassan , Gurusubrahmaniyan Subrahmaniyan Radhakrishnan , Vineet Nayak , Srinivasa Yasasvy Sateesh Bhamidipati , Jaydeep Vijay Ranade
Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which the operating characteristics (e.g., power consumption) of a power amplifier in a transceiver may be regulated according to an operation mode of the transceiver. More specifically, in some embodiments, different LUTs may be employed for each mode of operation to suitably adjust the supply voltage (e.g., bias voltage) and/or quiescent current input to the power amplifier based on an input signal and a margin by which transmission standards are met. Further, in some embodiments, a method to calibrate a LUT for average power tracking and/or envelope tracking in a transceiver mode of operation may be employed to populate a LUT that may be used to suitably adjust the power and/or current consumption of the power amplifier.
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公开(公告)号：US20190081712A1
公开(公告)日：2019-03-14
申请号：US15862279
申请日：2018-01-04
Applicant: Apple Inc.
Inventor： Wassim El-Hassan , Mohammad Reza Ghajar , Gurusubrahmaniyan Subrahmaniyan Radhakrishnan , Vineet Nayak , Srinivasa Yasasvy Sateesh Bhamidipati
Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which the operating characteristics (e.g., gain and/or efficiency) of a power amplifier in a transmitter may be regulated according to an operation mode of the transmitter. More specifically, in some embodiments, different LUTs may be employed for each mode of operation to suitably adjust the supply voltage to the power amplifier and modulate its operating characteristics based on power input to the power amplifier. Further, in some embodiments, a method to calibrate a LUT for ULCA, an operation mode of the transmitter, may be employed to populate a LUT that may be used to suitably adjust the supply voltage during ULCA.
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28.发明授权公开(公告)号：US09876588B2
公开(公告)日：2018-01-23
申请号：US14477703
申请日：2014-09-04
Applicant: Apple Inc.
Inventor： Chao Yuan , Wassim El-Hassan , Vishwanath Venkataraman
CPC classification number: H04B17/0085 , H04B17/16 , H04B17/19 , H04B17/21
Abstract: Radio-frequency performance of wireless communications circuitry on an electronic device under test (DUT) may be tested without external test equipment such as signal analyzers or signal generators. A first DUT may transmit test signals to a second DUT. External attenuator circuitry interposed between the DUTs may attenuate the test signals to desired power levels. The second DUT may characterize and/or calibrate receiver performance by generating wireless performance metric data based on the attenuated test signals. A single DUT may transmit test signals to itself via corresponding transmit and receive ports coupled together through the attenuator. The DUT may generate performance metric data based on the test signals. The DUT may include feedback receiver circuitry coupled to an output of a transmitter via a feedback path and may characterize and/or calibrate transmit performance using test signals transmitted by the transmitter and received by the feedback receiver.
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