Methods, systems, and non-transitory computer readable media for wideband frequency and bandwidth tunable filtering
First Claim
1. A method for wideband frequency and bandwidth tunable filtering, the method comprising:
- receiving a signal (102) for which wideband frequency and bandwidth tunable filtering is desired;
splitting the signal (102) into first and second input signals (102A, 102B);
delaying the first input signal (102A) relative to the second input signal (102B) to produce a first output signal (110);
modifying the second input signal (102B) to create a second output signal (114) having a desired frequency spectrum, wherein creating the second output signal (114) having the desired frequency spectrum includes creating a presaturated signal (130) having at least one of a desired phase, amplitude, and delay relative to the second input signal (102B), modifying the presaturated signal (130) to produce first and second limit signals (130A, 130B), and combining the first and second limit signals (130A, 130B) to create the second output signal (114) having the desired frequency spectrum;
adjusting at least one of phase, delay, amplitude magnitude, amplitude sign, and frequency spectrum of the second output signal (114) with respect to the first output signal 110; and
combining the second output signal (114) with the first output signal (110) to create a combined output signal (104) having the desired frequency response.
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Accused Products
Abstract
Methods, systems, and computer readable media for wideband frequency and bandwidth tunable filtering are disclosed. According to one aspect, the subject matter described herein includes a wideband frequency and bandwidth tunable filter that splits a filter input signal into first and second input signals, modifies the first input signal to produce a first output signal, modifies the second input signal to produce a second output signal having an intermediate frequency response, and combines the first and second output signals while adjusting their relative phases and/or amplitudes to produce a filter output signal with the target frequency response. Adjustment includes splitting the second input signal into third and fourth input signals, which are modified and then combined to produce the second output signal having the intermediate frequency response.
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Citations
16 Claims
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1. A method for wideband frequency and bandwidth tunable filtering, the method comprising:
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receiving a signal (102) for which wideband frequency and bandwidth tunable filtering is desired; splitting the signal (102) into first and second input signals (102A, 102B); delaying the first input signal (102A) relative to the second input signal (102B) to produce a first output signal (110); modifying the second input signal (102B) to create a second output signal (114) having a desired frequency spectrum, wherein creating the second output signal (114) having the desired frequency spectrum includes creating a presaturated signal (130) having at least one of a desired phase, amplitude, and delay relative to the second input signal (102B), modifying the presaturated signal (130) to produce first and second limit signals (130A, 130B), and combining the first and second limit signals (130A, 130B) to create the second output signal (114) having the desired frequency spectrum; adjusting at least one of phase, delay, amplitude magnitude, amplitude sign, and frequency spectrum of the second output signal (114) with respect to the first output signal 110; and combining the second output signal (114) with the first output signal (110) to create a combined output signal (104) having the desired frequency response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer readable medium having stored thereon executable instructions that when executed by the processor of a computer control the computer to perform steps comprising:
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receiving a signal (102) for which wideband frequency and bandwidth tunable filtering is desired; splitting the signal (102) into first and second input signals (102A, 102B), the second input signal 102B having at least one of a desired phase, amplitude, and delay relative to the first input signal (102A); delaying the first input signal (102A) relative to the second input signal (102B) to produce a first output signal (110); modifying the second input signal (102B) to create a second output signal (114) having a desired frequency spectrum, wherein creating the second output signal (114) having the desired frequency spectrum includes creating a presaturated signal (130) having at least one of a desired phase, amplitude, and delay relative to the second input signal (102B), modifying the presaturated signal (130) to produce first and second limit signals (130A, 130B), and combining the first and second limit signals (130A, 130B) to create the second output signal (114) having the desired frequency spectrum; adjusting at least one of phase, delay, amplitude magnitude, amplitude sign, and frequency spectrum of the second output signal (114) with respect to the first output signal (110); and combining the second output signal (114) with the first output signal (110) to create a combined output signal (104) having the desired frequency response.
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Specification