公开(公告)号：US20240054988A1

公开(公告)日：2024-02-15

申请号：US17763742

申请日：2021-04-22

Applicant: Google LLC

Inventor： Abhijit Shah ,  Guohua Sun ,  Lawrence Frederick Heyl ,  Niel David Warren

IPC: G10K11/178

CPC classification number: G10K11/17855 ,  G10K11/17854 ,  G10K11/17879 ,  G10K11/17885 ,  G10K2210/3053 ,  G10K2210/1081 ,  G10K2210/3027 ,  G10K2210/3026

Abstract: The subject matter described herein provides systems and techniques for filtering an audio signal using active noise cancellation (ANC). A channel response finite impulse response (CR FIR) filter in a conventional ANC system may be replaced with a two filter cascade configuration. The first filter in the cascade filter configuration may be a CR FIR filter with interleaved zero coefficients and the second filter may be a response interpolator filter that is a fixed interpolator. The CR FIR filter in the two filter cascade may be adaptive and may have its non-zero coefficients tracked, updated, adapted, and/or computed. The fixed interpolator in the two filter cascade may be fixed and therefore non-adaptive. The channel frequency response profile of the two filter cascade configuration may be similar to the channel frequency response profile of the conventional CR FIR filter that the cascade filter configuration replaces.

公开(公告)号：US20210072375A1

公开(公告)日：2021-03-11

申请号：US17095558

申请日：2020-11-11

Applicant: Google LLC

Inventor： Patrick M. Amihood ,  Abhijit Shah ,  Jaime Lien ,  Hakim Kader Bhai Raja

IPC: G01S13/88 ,  H04W52/02 ,  G01S13/04 ,  G01S13/18 ,  G01S13/58 ,  G01S7/02 ,  G01S7/40

Abstract: Techniques and apparatuses are described that enable low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. Power consumption is reduced through customization of the transmission or processing of radar signals within the radar system. During transmission, different duty cycles, transmit powers, or framing structures can be utilized to collect appropriate data based on detected activity in an external environment. During processing, different hardware or different radar pipelines can be utilized to appropriately analyze the radar data. Instead of disabling the radar system, the described techniques enable the radar system to continuously monitor a dynamic environment and maintain responsiveness while conserving power.

公开(公告)号：US20180329050A1

公开(公告)日：2018-11-15

申请号：US15974528

申请日：2018-05-08

Applicant: Google LLC

Inventor： Patrick M. Amihood ,  Abhijit Shah ,  Jaime Lien ,  Hakim Kader Bhai Raja

IPC: G01S13/88 ,  G01S13/18 ,  G01S13/04 ,  H04W52/02

CPC classification number: G01S13/88 ,  G01S7/02 ,  G01S13/04 ,  G01S13/18 ,  H04W52/0219

Abstract: Techniques and apparatuses are described that enable power management using a low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. In one aspect, the radar system can replace other power-hungry sensors and provide improved performance in the presence of different environmental conditions, such as low lighting, motion, or overlapping targets. In another aspect, the radar system can cause other components within the electronic device to switch to an off-state based on detected activity in an external environment. By actively switching the components between an on-state or the off-state, the radar system enables the computing device to respond to changes in the external environment without the use of an automatic shut-off timer or a physical touch or verbal command from a user.

公开(公告)号：US10914834B2

公开(公告)日：2021-02-09

申请号：US15974502

申请日：2018-05-08

Applicant: Google LLC

Inventor： Patrick M. Amihood ,  Abhijit Shah ,  Jaime Lien ,  Hakim Kader Bhai Raja

IPC: G01S13/88 ,  H04W52/02 ,  G01S13/04 ,  G01S13/18 ,  G01S13/58 ,  G01S7/02 ,  G01S7/40 ,  G01S7/41 ,  G01S13/56

Abstract: Techniques and apparatuses are described that enable low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. Power consumption is reduced through customization of the transmission or processing of radar signals within the radar system. During transmission, different duty cycles, transmit powers, or framing structures can be utilized to collect appropriate data based on detected activity in an external environment. During processing, different hardware or different radar pipelines can be utilized to appropriately analyze the radar data. Instead of disabling the radar system, the described techniques enable the radar system to continuously monitor a dynamic environment and maintain responsiveness while conserving power.

公开(公告)号：US12019149B2

公开(公告)日：2024-06-25

申请号：US17095558

申请日：2020-11-11

Applicant: Google LLC

Inventor： Patrick M. Amihood ,  Abhijit Shah ,  Jaime Lien ,  Hakim Kader Bhai Raja

IPC: G01S13/88 ,  G01S7/02 ,  G01S7/40 ,  G01S7/41 ,  G01S13/04 ,  G01S13/18 ,  G01S13/56 ,  G01S13/58 ,  H04W52/02

CPC classification number: G01S13/88 ,  G01S7/021 ,  G01S7/4008 ,  G01S13/04 ,  G01S13/18 ,  G01S13/582 ,  H04W52/0219 ,  G01S7/4013 ,  G01S7/411 ,  G01S7/415 ,  G01S13/56

Abstract: Techniques and apparatuses are described that enable low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. Power consumption is reduced through customization of the transmission or processing of radar signals within the radar system. During transmission, different duty cycles, transmit powers, or framing structures can be utilized to collect appropriate data based on detected activity in an external environment. During processing, different hardware or different radar pipelines can be utilized to appropriately analyze the radar data. Instead of disabling the radar system, the described techniques enable the radar system to continuously monitor a dynamic environment and maintain responsiveness while conserving power.

公开(公告)号：US20180329049A1

公开(公告)日：2018-11-15

申请号：US15974502

申请日：2018-05-08

Applicant: Google LLC

Inventor： Patrick M. Amihood ,  Abhijit Shah ,  Jaime Lien ,  Hakim Kader Bhai Raja

IPC: G01S13/88 ,  G01S13/18 ,  G01S13/04 ,  G01S7/02 ,  G01S7/40

CPC classification number: G01S13/88 ,  G01S7/02 ,  G01S13/04 ,  G01S13/18 ,  H04W52/0219

Abstract: Techniques and apparatuses are described that enable low-power radar. The described techniques enable a radar system to reduce overall power consumption, thereby facilitating incorporation and utilization of the radar system within power-limited devices. Power consumption is reduced through customization of the transmission or processing of radar signals within the radar system. During transmission, different duty cycles, transmit powers, or framing structures can be utilized to collect appropriate data based on detected activity in an external environment. During processing, different hardware or different radar pipelines can be utilized to appropriately analyze the radar data. Instead of disabling the radar system, the described techniques enable the radar system to continuously monitor a dynamic environment and maintain responsiveness while conserving power.