Patents by Inventor Anand Raghavan

Anand Raghavan 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).

  • Patent number: 12057642
    Abstract: Antenna-plexers for interference cancellation are provided herein. In certain embodiments, a wireless device includes an antenna, an antenna-plexer coupled to the antenna and configured to generate a feedback signal, a transmitter configured to transmit a transmit signal to the antenna by way of the antenna-plexer, a receiver configured to process a receive signal, and a feedback receiver configured to process the feedback signal from the antenna-plexer to provide compensation to the receive signal.
    Type: Grant
    Filed: September 7, 2023
    Date of Patent: August 6, 2024
    Assignee: Skyworks Solutions, Inc.
    Inventors: David Richard Pehlke, Anand Raghavan, Poul Olesen, Werner Schelmbauer, Thorsten Tracht, Wolfgang Thomann, Amir Israel Rubin, Assi Jakoby, Ofer Benjamin
  • Patent number: 12057866
    Abstract: Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system also includes a first switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch. The front end system further includes a transmit supplemental filter, a receive supplemental filter, and a second switch.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: August 6, 2024
    Assignee: Skyworks Solutions, Inc.
    Inventors: Joel Richard King, Tianming Chen, Shayan Farahvash, Stephane Richard Marie Wloczysiak, Anand Raghavan, David Richard Pehlke
  • Patent number: 12041001
    Abstract: Aspects of the disclosure provide a front-end module for a wireless device comprising at least one transmit path configured to provide a first sounding reference signal, at least one transmit/receive path coupled to at least one antenna port, a sounding-reference-signal port configured to provide the first sounding reference signal and to receive a second sounding reference signal, an antenna switching module coupled between the at least one transmit path, the at least one transmit/receive path, and the sounding-reference-signal port, the antenna switching module being configured to provide the first sounding reference signal from the transmit path to the at least one transmit/receive path and the sounding-reference-signal port and to provide the second sounding reference signal received at the sounding-reference-signal port to the at least one transmit/receive path.
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: July 16, 2024
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Srivatsan Jayaraman, Anand Raghavan, Jin Hoon Cho, Lige Wang
  • Publication number: 20240223231
    Abstract: A radio frequency front end system has a first receive path with a first receive filter and is configured to receive a first receive signal in a first band group from a first antenna. A first additional receive path is configured to receive a radio frequency signal from the first antenna unfiltered. A first switch is configured to couple the first antenna to either the first receive path or the first additional receive path to bypass the first receive filter.
    Type: Application
    Filed: December 28, 2023
    Publication date: July 4, 2024
    Inventors: David Richard Pehlke, Anand Raghavan, John Chi-Shuen Leung
  • Patent number: 11973523
    Abstract: Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system further includes at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: April 30, 2024
    Assignee: Skyworks Solutions, Inc.
    Inventors: Joel Richard King, Tianming Chen, Shayan Farahvash, Stephane Richard Marie Wloczysiak, Anand Raghavan, David Richard Pehlke
  • Patent number: 11967981
    Abstract: A diversity receiver module comprising a multiple pole multiple throw switch, one throw being connected to a signal path configured to support both ultra-high band transmit signals and high-band transmit signals, and another throw being connected to an ultra-high band signal path configured to output an ultra-high band receive signal; an ultra-high band filter configured to filter ultra-high band signals, the ultra-high band filter being connected to a pole of the switch via a signal path; a high band filter configured to filter high band receive signals, the high band filter being diplexed with the ultra-high band filter; and a high band signal path configured to output a high-band receive signal, the high band signal path being connected to the high band filter.
    Type: Grant
    Filed: September 27, 2022
    Date of Patent: April 23, 2024
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventor: Anand Raghavan
  • Publication number: 20240120953
    Abstract: According to the present disclosure there is provided a front-end module comprising a first antenna port and a second antenna port, a first filter forming a first signal path with the first antenna port and a second filter forming a second signal path with the second antenna port, the first or second filter being an adjustable filter. There is also provided a wireless device.
    Type: Application
    Filed: September 27, 2023
    Publication date: April 11, 2024
    Inventors: Anand Raghavan, David Richard Pehlke
  • Publication number: 20240072456
    Abstract: Antenna-plexers for interference cancellation are provided herein. In certain embodiments, a wireless device includes an antenna, an antenna-plexer coupled to the antenna and configured to generate a feedback signal, a transmitter configured to transmit a transmit signal to the antenna by way of the antenna-plexer, a receiver configured to process a receive signal, and a feedback receiver configured to process the feedback signal from the antenna-plexer to provide compensation to the receive signal.
    Type: Application
    Filed: September 7, 2023
    Publication date: February 29, 2024
    Inventors: David Richard Pehlke, Anand Raghavan, Poul Olesen, Werner Schelmbauer, Thorsten Tracht, Wolfgang Thomann, Amir Israel Rubin, Assi Jakoby, Ofer Benjamin
  • Publication number: 20240022284
    Abstract: Radio frequency (RF) communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter including a power amplifier that amplifies an RF transmit signal, a receiver including a low noise amplifier (LNA) that amplifies an RF receive signal, and an interference cancellation circuit that selects a bandpass filter from a plurality of bandpass filters to filter the RF transmit signal after amplification by the power amplifier. The selected bandpass filter operates in combination with a controllable gain circuit and a controllable phase circuit to generate an analog interference cancellation signal that is injected into the receiver to compensate the RF receive signal for interference arising from the transmitter.
    Type: Application
    Filed: August 4, 2023
    Publication date: January 18, 2024
    Inventors: Anand Raghavan, David Richard Pehlke, Poul Olesen
  • Publication number: 20230421831
    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for modifying one or more parameters of a data streaming bitrate selection algorithm based on machine learning. An example embodiment operates by training and operating a first machine learning model to predict a sustainable network bandwidth. A second machine learning model is trained to receive the sustainable network bandwidth and predict a likelihood that this network bandwidth will not empty a data buffer of streaming data. A bitrate is selected based on the likelihood being below a threshold percentage, such as 50%.
    Type: Application
    Filed: September 7, 2023
    Publication date: December 28, 2023
    Applicant: ROKU, INC.
    Inventors: Amit Paliwal, Andrey Marsavin, Govind Vaidya, Wim Michiels, Beth Teresa Logan, Zheng Han, Tapan Oza, Vijay Anand Raghavan
  • Patent number: 11855663
    Abstract: The radio frequency front-end systems herein include modules having bandwidth controllable components, such as amplifier and filters. By implementing the modules with bandwidth control, the same module can be used for operation of multiple frequency bands including a first frequency band and a second frequency band. Thus, when implementing features such as carrier aggregation, multiple-input multiple-output (MIMO), and/or sounding resource signaling (SRS) for supporting the multiple frequency bands, the total number of modules used can be reduced and/or additional feature support can be provided compared to an implementation in which each module supports a single frequency band.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: December 26, 2023
    Assignee: Skyworks Solutions, Inc.
    Inventors: Lup Meng Loh, Aleksey A. Lyalin, David Richard Pehlke, Anand Raghavan, Jin Hoon Cho
  • Publication number: 20230412198
    Abstract: The radio frequency front-end systems herein include modules having bandwidth controllable components, such as amplifier and filters. By implementing the modules with bandwidth control, the same module can be used for operation of multiple frequency bands including a first frequency band and a second frequency band. Thus, when implementing features such as carrier aggregation, multiple-input multiple-output (MIMO), and/or sounding resource signaling (SRS) for supporting the multiple frequency bands, the total number of modules used can be reduced and/or additional feature support can be provided compared to an implementation in which each module supports a single frequency band.
    Type: Application
    Filed: August 31, 2023
    Publication date: December 21, 2023
    Inventors: Lup Meng Loh, Aleksey A. Lyalin, David Richard Pehlke, Anand Raghavan, Jin Hoon Cho
  • Publication number: 20230353189
    Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management in a mobile device includes processing a wireless local area network (WLAN) observation signal to generate WLAN observation data using a WLAN observation channel of a WLAN transceiver, processing an RF cellular receive signal to generate a digital baseband cellular receive signal using a cellular receive channel of a cellular transceiver, processing a cellular observation signal to generate cellular observation data using a cellular observation channel of the cellular transceiver, and compensating the digital baseband cellular receive signal for RF signal leakage based on the WLAN observation data and on the cellular observation data using a discrete time cancellation circuit of the cellular transceiver.
    Type: Application
    Filed: June 29, 2023
    Publication date: November 2, 2023
    Inventor: Anand Raghavan
  • Publication number: 20230351348
    Abstract: A method may include determining a combination of values of attributes represented by reference data associated with payment transaction by training a machine learning model based on an association between (i) respective values of the attributes and (ii) the payment transactions having a given result. The combination may be correlated with having the given result. The method may also include selecting a subset of the payment transactions that is associated with the combination of values. The method may additionally include determining a first rate at which payment transactions of the subset have the given result during a first time period and a second rate at which one or more payment transactions associated with the combination have the given result during a second time period, and generating an indication that the two rates differ.
    Type: Application
    Filed: June 22, 2023
    Publication date: November 2, 2023
    Inventors: Sayan Maity, Christopher Carl Underwood, Beth Teresa Logan, Sreeram Srinivasan, Shanshan Tuo, Pradeep Reddy, Vijay Anand Raghavan, Raviteja Gunda, Shih-Ting Liu, Thong Le Nguyen
  • Publication number: 20230353176
    Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management includes generating an RF observation signal based on observing a cellular transmit signal using a cellular front end system, processing the RF observation signal to generate digital observation data using a cellular transceiver, generating a digital wireless local area network (WLAN) receive signal based on processing an RF WLAN receive signal using a WLAN transceiver, compensating the digital baseband WLAN receive signal for RF signal leakage based on the digital observation data using a discrete time cancellation circuit of the WLAN transceiver.
    Type: Application
    Filed: June 29, 2023
    Publication date: November 2, 2023
    Inventor: Anand Raghavan
  • Publication number: 20230344456
    Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a mobile device including a cellular front end system that includes a cellular signal path for a cellular transmit signal. The cellular signal path includes an antenna switch, a first directional coupler before the antenna switch, and a second directional coupler after the antenna switch. The cellular front end system includes a first observation switch receiving a first sensed radio frequency signal from the first directional coupler and a second sensed radio frequency signal from the second directional coupler, and outputting a radio frequency cellular observation signal. The mobile device further includes a cellular transceiver that processes the radio frequency cellular observation signal to generate digital cellular observation data, and a wireless local area network transceiver that receives an RF wireless local area network receive signal and the digital cellular observation data.
    Type: Application
    Filed: June 29, 2023
    Publication date: October 26, 2023
    Inventor: Anand Raghavan
  • Publication number: 20230344463
    Abstract: RF communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter that transmits a transmit signal through a first front end circuit, a receiver that processes a receive signal from a second front end circuit, and a feedback receiver that processes a feedback signal from the first front end circuit to generate a digital interference cancellation signal that compensates the receiver for interference arising from the transmitter.
    Type: Application
    Filed: June 22, 2023
    Publication date: October 26, 2023
    Inventors: David Richard Pehlke, Anand Raghavan, Poul Olesen, Werner Schelmbauer, Thorsten Tracht, Wolfgang Thomann, Amir Israel Rubin, Assi Jakoby, Ofer Benjamin
  • Publication number: 20230344452
    Abstract: Radio frequency front-end systems with filter reuse. In certain embodiments, a front-end system includes a filter, a low noise amplifier (LNA), and a switch interposed between the filter and an input to the LNA. In a first state of the switch, the filter serves to filter a radio frequency signal that is amplified by the LNA. The front-end system further includes a power amplifier that is coupled to the switch. Additionally, in a second state of the switch, the filter serves to filter an amplified radio frequency transmit signal provided by the power amplifier. Accordingly, a filter along a receive path of the front-end system is reused for transmit.
    Type: Application
    Filed: April 27, 2023
    Publication date: October 26, 2023
    Inventors: Lup Meng Loh, Aleksey A. Lyalin, David Richard Pehlke, Anand Raghavan, Jin Hoon Cho
  • Patent number: 11800167
    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for modifying one or more parameters of a data streaming bitrate selection algorithm based on machine learning. An example embodiment operates by training and operating a first machine learning model to predict a sustainable network bandwidth. A second machine learning model is trained to receive the sustainable network bandwidth and predict a likelihood that this network bandwidth will not empty a data buffer of streaming data. A bitrate is selected based on the likelihood being below a threshold percentage, such as 50%.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: October 24, 2023
    Assignee: ROKU, INC.
    Inventors: Amit Paliwal, Andrey Marsavin, Govind Vaidya, Wim Michiels, Beth Teresa Logan, Zheng Han, Tapan Oza, Vijay Anand Raghavan
  • Patent number: 11784419
    Abstract: Antenna-plexers for interference cancellation are provided herein. In certain embodiments, a wireless device includes an antenna, an antenna-plexer coupled to the antenna and configured to generate a feedback signal, a transmitter configured to transmit a transmit signal to the antenna by way of the antenna-plexer, a receiver configured to process a receive signal, and a feedback receiver configured to process the feedback signal from the antenna-plexer to provide compensation to the receive signal.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: October 10, 2023
    Assignee: Skyworks Solutions, Inc.
    Inventors: David Richard Pehlke, Anand Raghavan, Poul Olesen, Werner Schelmbauer, Thorsten Tracht, Wolfgang Thomann, Amir Israel Rubin, Assi Jakoby, Ofer Benjamin