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Systems, and methods for suppressing radio interference from a noise source via active filtering

A noise source and radio equipment technology, applied in the field of active filtering noise source interference from motor vehicle radio equipment, can solve problems such as interference

Inactive Publication Date: 2009-04-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the AM band extends from 520kHz to 1710kHz in 10kHz increments, harmonics of switching power supplies operating at low frequencies can cause interference at certain AM band frequencies

Method used

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  • Systems, and methods for suppressing radio interference from a noise source via active filtering
  • Systems, and methods for suppressing radio interference from a noise source via active filtering
  • Systems, and methods for suppressing radio interference from a noise source via active filtering

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Embodiment Construction

[0013] The following detailed description is merely exemplary in nature and is not intended to limit the present invention or the application and use of the present invention. In addition, it is not intended to be bound by any expressed or implied theory presented in the foregoing technical field, background art, summary of the invention or the following detailed description.

[0014] figure 1 It is a block diagram of an exemplary embodiment of a system 100 for suppressing radio interference from a noise source 50. The system 100 includes a controller 110 that can be coupled to a noise source 50 and a radio 120 that includes a filter 128 coupled to the controller 110.

[0015] The controller 110 may be any device, hardware, and / or software configured to command the noise source 50 to operate at a specific frequency. The controller 110 is also configured to dither the operating frequency of the noise source 50 so that the noise source 50 operates at multiple operating frequencies...

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Abstract

Apparatus, systems, and methods are provided for suppressing radio interference from a noise source. One apparatus includes a controller for commanding a noise source to dither its operating frequency, and a filter for receiving signals from the controller indicating the present operating frequency of the noise source and to filter radio signals having the same frequency as the present operating frequency while the operating frequency is dithered. A system includes an electric motor having an operating frequency, a controller for commanding the motor to dither its operating frequency, and a filter configured to receive signals indicating the present operating frequency of the motor and to filter radio signals having the same frequency as the present operating frequency while the operating frequency is dithered. One method includes dithering the operating frequency of a noise source and filtering signals having the same frequency as the operating frequency while it is dithered.

Description

Technical field [0001] The present invention generally relates to radio equipment, and more particularly relates to active filtering of noise source interference from motor vehicle radio equipment. Background technique [0002] Many motor vehicles use a switching power supply, which uses pulse width modulation to convert the stock vehicle voltage (usually 12V) from the vehicle power supply into any specific required for operating various electronic modules connected to the power supply. Voltage level. The switching power supply generates a switching voltage by selectively switching the electronic devices ON and OFF at a certain operating frequency. The output voltage of this power supply is determined by the duty cycle of the switching voltage. [0003] For example, in hybrid vehicles, switching power supplies used for electric motors of drive trains often operate at low frequencies (eg, frequencies less than 10 kilohertz (kHz)). These low frequencies are selected based on consid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B15/02H04H40/18
CPCH04B15/02
Inventor V·M·帕特尔
Owner GM GLOBAL TECH OPERATIONS LLC