Smart FFT measurement for reconfigurable sensor using a wideband digital receiver
OwnerPrasanna Kumar Daraminventor
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Abstract
Processes and devices for finding signals within a frequency range include converting an analog input signal to a digital domain using an analog-to-digital converter to create a digital input signal. A first fast Fourier transform (FFT) converts the digital input signal to a frequency input signal, which is binned based on frequency and a threshold to create a binary filter. The digital input signal (from the analog-to-digital converter) is sorted into containers (e.g., using the Chinese remainder theorem) and then run through a second FFT to convert the digital input signal to a frequency intermediate signal. The frequency intermediate signal is sorted into bins and multiplied using the binary filter to create an output frequency signal.
Claims20
A process for finding signals within a frequency range, the process comprising:
- using a first fast Fourier transform (FFT) with a number of points to convert a digital input signal to a frequency input signal;
- binning the frequency input signal into bins based on frequency and a threshold to create a binary filter;
- sorting the digital input signal into containers;
- collecting, from the containers, a number of points equal to the number of points of the first FFT;
- using a second FFT with the number of points equal to the number of points of the first FFT to convert the digital input signal to a frequency intermediate signal;
- sorting the frequency intermediate signal into bins;
- using the binary filter to select bins of interest of the bins to create an output frequency signal from the bins of interest.
An ultra-wideband receiver comprising:
- an analog-to-digital converter that converts an analog input signal to a digital input signal;
- and
- a processor coupled to the analog-to-digital converter, wherein the processor performs:
- using a first fast Fourier transform (FFT) with a number of points to convert the digital input signal to a frequency input signal;
- binning the frequency input signal into bins based on frequency and a threshold to create a binary filter;
- sorting the digital input signal into containers;
- collecting, from the containers, a number of points equal to the number of points of the first FFT;
- using a second FFT with the number of points equal to the number of points of the first FFT to convert the digital input signal to a frequency intermediate signal;
- sorting the frequency intermediate signal into bins;
- using the binary filter to select bins of interest of the bins to create an output frequency signal from the bins of interest.
An ultra-wideband receiver comprising:
- an analog-to-digital converter that converts an analog input signal to a digital input signal;
- a processor coupled to the analog-to-digital converter;
- a fast Fourier transform (FFT) system implemented in hardware;
- wherein:
- the FFT includes a number of points and converts the digital input signal to a frequency input signal;
- the processor:
- bins the frequency input signal into bins based on frequency and a threshold to create a binary filter;
- sorts the digital input signal into containers;
- collects, from the containers, a number of points equal to the number of points of the first FFT;
- the FFT converts the digital input signal to a frequency intermediate signal;
- and
- the processor further:
- sorts the frequency intermediate signal into bins;
- uses the binary filter to select bins of interest of the bins to create an output frequency signal from the bins of interest.
Dependencies are inferred from the claim text.