Method and apparatus for wideband frequency discrimination
AssigneeE-Systems, Inc.
InventorJose Meza
Life of this patent
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Abstract
A method and apparatus for wideband frequency discrimination uses a first power divider for dividing an input signal into first, second and third output signals. First and second delay circuits are provided for receiving the first and second output signals, respectively, and in response thereto generate time-delayed versions of these signals. A second power divider is connected to the first and second delay circuits and to the first power divider for receiving the time-delayed versions of the first and second output signals and for receiving the third output signal and in response thereto generating a vector sum output of these signals. Signal processing circuitry is provided to process the vector sum output to generate a frequency-discriminated signal.
Claims16
A wideband frequency discriminator, comprising:
- a first power divider for dividing an input signal into first, second and third output signals;
- means connected to the first power divider for receiving the first output signal and generating a time-delayed version thereof and for receiving the second output signal and generating a time-delayed version thereof;
- a second power divider connected to said means for receiving and to the first power divider for receiving the time-delayed versions of the first and second output signals and for receiving the third output and in response thereto generating a vector sum output of these signals;
- and
- means connected to the second power divider for processing the vector sum output to generate a frequency-discriminated signal.
A wideband frequency discriminator, comprising:
- a first power divider for dividing an input signal into first, second and third output signals;
- a first delay circuit connected to the first power divider for receiving the first output signal and generating a time-delayed version thereof;
- a second delay circuit connected to the first power divider for receiving the second output signal and generating a time-delayed version thereof;
- a second power divider connected to the first and second delay circuits and to the first power divider for receiving the time-delayed versions of the first and second outputs signals and for receiving the third output signal and in response thereto generating a vector sum output of these signals;
- a high gain IF amplifier connected to the second power divider for receiving the vector sum output and generating an amplified version thereof;
- a fullwave rectifier including first and second diodes connected to the high gain IF amplifier for receiving the amplified version of the vector sum output and generating a rectified version thereof, said high gain IF amplifier controlling the gain of said diodes to thereby control the resolution of the frequency discriminator;
- and
- a low pass filter connected to the output of the first and second diodes of said fullwave rectifier for generating a frequency-discriminated signal.
A method for wideband frequency discrimination, comprising the steps of:
- dividing an input signal into first, second and third output signals;
- delaying the first output signal to generate a time-delayed version thereof;
- delaying the second output signal for generating a time-delayed version thereof;
- generating a vector sum output of the time-delayed versions of the first and second outputs and the third output signals;
- and
- processing the vector sum output to generate a frequency-discriminated signal.
A wideband frequency discriminator, comprising:
- means for dividing an input signal into first, second and third output signals;
- means connected to said means for dividing for delaying the first output signal to generate a time-delayed version thereof;
- means connected to said means for dividing for delaying the second output signal for generating a time-delayed version thereof;
- means connected to said means for dividing and to both of said means for delaying for generating a vector sum output of the time-delayed versions of the first and second outputs and the third output signal;
- and
- means connected to said means for generating for processing the vector sum output to generate a frequency-discriminated signal.
Dependencies are inferred from the claim text.