METHODS, SYSTEMS, AND NON-TRANSITORY COMPUTER READABLE MEDIA FOR WIDEBAND FREQUENCY AND BANDWIDTH TUNABLE FILTERING
First Claim
1. A receiver with tunable filter, the receiver comprising:
- an interface for receiving at least one input signal; and
a wideband frequency and bandwidth tunable filter for filtering the at least one input signal and producing a filtered output signal having a desired frequency response, the filter including a filter input node for receiving the at least one input signal from the interface, the filter comprising;
a first signal path for receiving a first filter input signal from the filter input node and producing a first filter output signal;
a second signal path for receiving a second filter input signal from the filter input node and producing a second filter output signal, the second signal path including an adjustment circuit for adjusting the frequency spectrum of the second filter input signal to produce the second filter output signal;
a conditioning circuit for conditioning at least one of the first filter input signal and the second filter input signal to provide at least one conditioned input signal to the adjustment circuit;
a compensation device for adjusting at least one of a phase of the first filter output signal relative to a phase of the second filter output signal and an amplitude of the first filter output signal relative to an amplitude of the second filter output signal; and
a signal combiner for combining the first filter output signal with the second filter output signal to produce the filtered output signal having a desired frequency spectrum.
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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.
5 Citations
9 Claims
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1. A receiver with tunable filter, the receiver comprising:
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an interface for receiving at least one input signal; and a wideband frequency and bandwidth tunable filter for filtering the at least one input signal and producing a filtered output signal having a desired frequency response, the filter including a filter input node for receiving the at least one input signal from the interface, the filter comprising; a first signal path for receiving a first filter input signal from the filter input node and producing a first filter output signal; a second signal path for receiving a second filter input signal from the filter input node and producing a second filter output signal, the second signal path including an adjustment circuit for adjusting the frequency spectrum of the second filter input signal to produce the second filter output signal; a conditioning circuit for conditioning at least one of the first filter input signal and the second filter input signal to provide at least one conditioned input signal to the adjustment circuit; a compensation device for adjusting at least one of a phase of the first filter output signal relative to a phase of the second filter output signal and an amplitude of the first filter output signal relative to an amplitude of the second filter output signal; and a signal combiner for combining the first filter output signal with the second filter output signal to produce the filtered output signal having a desired frequency spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification