Patents by Inventor Srinivasa Yasasvy Sateesh Bhamidipati
Srinivasa Yasasvy Sateesh Bhamidipati has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230361889Abstract: A radio frequency device includes antennas, transmitters, power detectors, a memory storing instructions and an antenna gain lookup table, and processors. The processors execute instructions that include instructing the transmitters to send transmission signals through the antennas to form a first beamformed signal having a first beam direction and a first frequency using multiple input powers. The instructions include determining radio frequency integrated circuit (RFIC) gains associated with the transmitters based on the transmission signals using the power detectors. Moreover, the instructions include determining the antenna gains for the antennas based on the first beam direction and the first frequency of the first beamformed signal, and the antenna gain lookup table. The instructions also include determining total gains based on the RFIC gains and the antenna gains, and adjusting the input powers based on the total gains and a back off power signal.Type: ApplicationFiled: July 21, 2023Publication date: November 9, 2023Inventors: Wassim El-Hassan, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Srinivasa Yasasvy Sateesh Bhamidipati, Daphne Irene Gorman, Vineet Nayak, Xuefeng Zhao
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Publication number: 20230361460Abstract: Techniques to reduce signal interference between wired signals communicated within an electronic device and wireless signals transmitted to or received from antennas of the electronic device are disclosed. The electronic device includes an interposer with an inner fence and an outer fence having offset gaps to prevent a pathway otherwise formed by overlapping tabs, where the pathway allows noise leakage from the wired signals. In some embodiments, the electronic device (e.g., in a main logic board package) includes a ground fencing of ground vias to prevent the noise leakage from harmonics associated with signal vias communicating the wired signals. The spacing between the ground vias is based on frequencies of signals that the ground vias are intended to block.Type: ApplicationFiled: May 6, 2022Publication date: November 9, 2023Inventors: Xiaofang Mu, Chi V Pham, Mingjuan Zhu, Bo Tong Deng, Bo Zhang, Srinivasa Yasasvy Sateesh Bhamidipati, Vineet Nayak, Daniel C Kong
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Patent number: 11722230Abstract: A radio frequency device includes antennas, transmitters, power detectors, a memory storing instructions and an antenna gain lookup table, and processors. The processors execute instructions that include instructing the transmitters to send transmission signals through the antennas to form a first beamformed signal having a first beam direction and a first frequency using multiple input powers. The instructions include determining radio frequency integrated circuit (RFIC) gains associated with the transmitters based on the transmission signals using the power detectors. Moreover, the instructions include determining the antenna gains for the antennas based on the first beam direction and the first frequency of the first beamformed signal, and the antenna gain lookup table. The instructions also include determining total gains based on the RFIC gains and the antenna gains, and adjusting the input powers based on the total gains and a back off power signal.Type: GrantFiled: October 8, 2020Date of Patent: August 8, 2023Assignee: Apple Inc.Inventors: Wassim El-Hassan, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Srinivasa Yasasvy Sateesh Bhamidipati, Daphne Irene Gorman, Vineet Nayak, Xuefeng Zhao
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Patent number: 11349533Abstract: 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.Type: GrantFiled: September 28, 2018Date of Patent: May 31, 2022Assignee: Apple Inc.Inventors: Srinivasa Yasasvy Sateesh Bhamidipati, Vineet Nayak, Wassim El-Hassan, Xuefeng Zhao
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Publication number: 20220045772Abstract: A radio frequency device includes antennas, transmitters, power detectors, a memory storing instructions and an antenna gain lookup table, and processors. The processors execute instructions that include instructing the transmitters to send transmission signals through the antennas to form a first beamformed signal having a first beam direction and a first frequency using multiple input powers. The instructions include determining radio frequency integrated circuit (RFIC) gains associated with the transmitters based on the transmission signals using the power detectors. Moreover, the instructions include determining the antenna gains for the antennas based on the first beam direction and the first frequency of the first beamformed signal, and the antenna gain lookup table. The instructions also include determining total gains based on the RFIC gains and the antenna gains, and adjusting the input powers based on the total gains and a back off power signal.Type: ApplicationFiled: October 8, 2020Publication date: February 10, 2022Inventors: Wassim El-Hassan, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Srinivasa Yasasvy Sateesh Bhamidipati, Daphne Irene Gorman, Vineet Nayak, Xuefeng Zhao
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Patent number: 11012164Abstract: An electronic device has multiple transmitters to transmit multiple signals. The electronic device also has a receiver to receive a signal. Moreover, the electronic device has a memory to store instructions and a processor to execute the instructions. The instructions cause the processor to send a test transmission signal from a transmitter of the multiple of transmitters, receive the test transmission signal at the receiver, and determine a gain of the test transmission signal. In response to determining that the gain is within a threshold range of an initial gain, the instructions cause the processor to send an indication that the receiver is operating as expected.Type: GrantFiled: September 27, 2019Date of Patent: May 18, 2021Assignee: Apple Inc.Inventors: Wassim El-Hassan, Bassel Husam Alesh, Srinivasa Yasasvy Sateesh Bhamidipati, Daphne Irene Gorman, Vineet Nayak, Xuefeng Zhao, Xiaohui Gong
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Publication number: 20210099241Abstract: An electronic device has multiple transmitters to transmit multiple signals. The electronic device also has a receiver to receive a signal. Moreover, the electronic device has a memory to store instructions and a processor to execute the instructions. The instructions cause the processor to send a test transmission signal from a transmitter of the multiple of transmitters, receive the test transmission signal at the receiver, and determine a gain of the test transmission signal. In response to determining that the gain is within a threshold range of an initial gain, the instructions cause the processor to send an indication that the receiver is operating as expected.Type: ApplicationFiled: September 27, 2019Publication date: April 1, 2021Inventors: Wassim El-Hassan, Bassel Husam Alesh, Srinivasa Yasasvy Sateesh Bhamidipati, Daphne Irene Gorman, Vineet Nayak, Xuefeng Zhao, Xiaohui Gong
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Patent number: 10833750Abstract: 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.Type: GrantFiled: September 28, 2018Date of Patent: November 10, 2020Assignee: Apple Inc.Inventors: Srinivasa Yasasvy Sateesh Bhamidipati, Vineet Nayak, Wassim El-Hassan, Xuefeng Zhao
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Patent number: 10778345Abstract: 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 look-up tables (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 uplink carrier aggregation (ULCA) operation mode of the transmitter may be employed to populate a LUT used to suitably adjust the supply voltage during ULCA.Type: GrantFiled: January 4, 2018Date of Patent: September 15, 2020Assignee: Apple, Inc.Inventors: Wassim El-Hassan, Mohammad Reza Ghajar, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Vineet Nayak, Srinivasa Yasasvy Sateesh Bhamidipati
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Publication number: 20200106506Abstract: 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.Type: ApplicationFiled: September 28, 2018Publication date: April 2, 2020Inventors: Srinivasa Yasasvy Sateesh Bhamidipati, Vineet Nayak, Wassim El-Hassan, Xuefeng Zhao
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Publication number: 20200106493Abstract: 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.Type: ApplicationFiled: September 28, 2018Publication date: April 2, 2020Inventors: Srinivasa Yasasvy Sateesh Bhamidipati, Vineet Nayak, Wassim El-Hassan, Xuefeng Zhao
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Patent number: 10454423Abstract: 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.Type: GrantFiled: April 12, 2018Date of Patent: October 22, 2019Assignee: APPLE INC.Inventors: Wassim El-Hassan, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Vineet Nayak, Srinivasa Yasasvy Sateesh Bhamidipati, Jaydeep Vijay Ranade
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Publication number: 20190319583Abstract: 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.Type: ApplicationFiled: April 12, 2018Publication date: October 17, 2019Inventors: Wassim El-Hassan, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Vineet Nayak, Srinivasa Yasasvy Sateesh Bhamidipati, Jaydeep Vijay Ranade
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Publication number: 20190081712Abstract: 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.Type: ApplicationFiled: January 4, 2018Publication date: March 14, 2019Inventors: Wassim El-Hassan, Mohammad Reza Ghajar, Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Vineet Nayak, Srinivasa Yasasvy Sateesh Bhamidipati
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Publication number: 20170126258Abstract: An electronic device may include wireless communications circuitry that has first and second digital predistortion circuits. The first predistortion circuit receives a first signal at a first frequency while the second predistortion circuit receives a second signal at a second frequency. The first circuit may perform predistortion operations on the first signal using non-unity predistortion coefficients to generate a predistorted signal. The second circuit may apply unity predistortion coefficients to the second signal to generate an undistorted signal. An adder may combine the predistorted and undistorted signals to generate a combined signal that is amplified by amplifier circuitry. An antenna may transmit the amplified signal.Type: ApplicationFiled: September 19, 2016Publication date: May 4, 2017Inventors: Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Wassim El-Hassan, Srinivasa Yasasvy Sateesh Bhamidipati, Hailong Yang
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Patent number: 9634695Abstract: An electronic device may include wireless communications circuitry that has first and second digital predistortion circuits. The first predistortion circuit receives a first signal at a first frequency while the second predistortion circuit receives a second signal at a second frequency. The first circuit may perform predistortion operations on the first signal using non-unity predistortion coefficients to generate a predistorted signal. The second circuit may apply unity predistortion coefficients to the second signal to generate an undistorted signal. An adder may combine the predistorted and undistorted signals to generate a combined signal that is amplified by amplifier circuitry. An antenna may transmit the amplified signal.Type: GrantFiled: September 19, 2016Date of Patent: April 25, 2017Assignee: Apple Inc.Inventors: Gurusubrahmaniyan Subrahmaniyan Radhakrishnan, Wassim El-Hassan, Srinivasa Yasasvy Sateesh Bhamidipati, Hailong Yang