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US 9,467,113 B2Granted
Method and apparatus for signal filtering and for improving properties of electronic devices
AssigneeAvatekh, Inc.
InventorAlexei V. Nikitin
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AssigneeAvatekh, Inc.
InventorAlexei V. Nikitin
Estimating the term…
The present invention relates to nonlinear signal processing, and, in particular, to adaptive nonlinear filtering of real-, complex-, and vector-valued signals utilizing analog Nonlinear Differential Limiters (NDLs), and to adaptive real-time signal conditioning, processing, analysis, quantification, comparison, and control. More generally, this invention relates to methods, processes and apparatus for real-time measuring and analysis of variables, and to generic measurement systems and processes. This invention also relates to methods and corresponding apparatus for measuring which extend to different applications and provide results other than instantaneous values of variables. The invention further relates to post-processing analysis of measured variables and to statistical analysis. The NDL-based filtering method and apparatus enable improvements in the overall properties of electronic devices including, but not limited to, improvements in performance, reduction in size, weight, cost, and power consumption, and, in particular for wireless devices, NDLs enable improvements in spectrum usage efficiency.
A method for processing a digital signal by a digital signal processing unit wherein said digital signal processing unit is configurable to perform one or more functions including a filtering function transforming an input signal into an output filtered signal, wherein said filtering function comprises a nonlinear lowpass stage characterized by a bandwidth and transforming a nonlinear lowpass stage input signal into a nonlinear lowpass stage output signal, and wherein said bandwidth depends on a magnitude of a difference between a current value of said nonlinear lowpass stage input signal and a previous value of said nonlinear lowpass stage output signal.
A digital signal processing apparatus comprising a digital signal processing unit configurable to perform one or more functions including a filtering function transforming an input signal into an output filtered signal, wherein said filtering function comprises a nonlinear lowpass stage characterized by a bandwidth and transforming a nonlinear lowpass stage input signal into a nonlinear lowpass stage output signal, and wherein said bandwidth depends on a magnitude of a difference between a current value of said nonlinear lowpass stage input signal and a previous value of said nonlinear lowpass stage output signal.
A digital signal processing apparatus comprising a digital signal processing unit configurable to perform one or more functions including a filtering function transforming an input signal into an output filtered signal, wherein said filtering function comprises a nonlinear lowpass stage characterized by a bandwidth and transforming a nonlinear lowpass stage input signal into a nonlinear lowpass stage output signal, wherein said bandwidth is operable to depend on a control signal, further comprising a control signal block operable to output said control signal, wherein said control signal is a function of a plurality of input signals of said control signal block, and wherein said plurality of input signals of said control signal block comprises said nonlinear lowpass stage input signal and a feedback of said nonlinear lowpass stage output signal.
Dependencies are inferred from the claim text.