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US 8,027,652 B2Granted
Radio front end
AssigneeContinental Automotive Systems US, Inc.
InventorStephen K. Gilbert
Life of this patent
Estimating the term…
Abstract
A radio front end utilizes at least one band pass filter to pass only the appropriate frequency band. Once the desired frequency band has been isolated it is converted to a digital format in an analog to digital converter and a digital signal processing device interprets the signal.
Claims12
A radio front end comprising:
- no more than one radio frequency antenna;
- a first filter connected to said antenna for passing a first range of radio frequencies comprising an entire radio frequency band;
- a second filter connected to said antenna for passing a second range of radio frequencies comprising an entire radio frequency band;
- a device for selecting between said first and second filters;
- each of said first range of radio frequencies and said second range of radio frequencies comprising at least a portion of frequencies not encompassed by the other of said first range of frequencies and said second range of frequencies;
- an analog to digital converter for receiving said entire radio frequency band from said at least one filter and outputting an output signal;
- said analog to digital converter being connected between said at least one filter and a digital signal processing unit;
- and
- said digital signal processing unit for receiving the output signal of said analog to digital converter.
6 more elements
A method for preparing a radio signal for digital signal processing comprising:
- receiving an analog signal;
- passing said analog signal through a first and second fixed frequency range filter, wherein said first fixed frequency range filter passes a first range of radio frequencies comprising an entire radio frequency band, said second fixed frequency range filter passes a second range of radio frequencies comprising an entire radio frequency band, and each of said first range of radio frequencies and said second range of radio frequencies comprising at least a portion of frequencies not encompassed by the other of said first range of frequencies and said second range of frequencies;
- selecting between the output of said fixed frequency range filter and said second fixed frequency range filter and passing a selected output to an analog to digital converter;
- converting the analog signal to a digital signal;
- and
- sending the digital signal to a digital signal processor.
3 more elements
Dependencies are inferred from the claim text.