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US 9,001,864 B2Granted
Apparatus and method for producing or reproducing a complex waveform over a wide frequency range while minimizing degradation and number of discrete emitters
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorGeorge Whitaker
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Abstract
An apparatus and method for signal emitters determining and using a reduced number of discrete frequency transmitters based on frequency segmentation and degradation analysis of a candidate filter configuration compared to an original waveform input signal for acceptability determination in view of desired system parameters. A method that configures a device to produce a complex waveform over a desired range of frequencies is provided. Configuring a device can include filtering to reduce a number of frequencies which in turn is used to reduce signal emitters and configuring resulting reduced signal emitters includes producing a desired complex waveform over a desired range of frequencies.
Claims20
A signal emitter comprising:
- a plurality of wave signal emitters configured to emit a final output filtered waveform at a plurality of discrete frequencies;
- a control system coupled to and adapted to control said plurality of wave signal emitters comprising a signal processor and a storage medium configured to determine said final output filtered waveform over a desired range of frequencies associated with said plurality of wave signal emitters;
- said control system configured to perform wavelet transforms to generate candidate solutions from which said final output filtered waveform is selected, wherein said final output filtered waveform selection is made in part by said control system based on filtering control processing comprising frequency segmentation;
- wherein said filtering control processing comprises:
- a first determination of a size of a wavelet transform based on determining a sampling rate;
- a second determination based on multiple filtered complex waveform comparisons based on frequency bin analysis, reduction of frequency bins for each different multiple filtered complex waveform, and comparison of differences between a first input waveform and each of said multiple filtered complex waveforms;
- wherein said control system selects said final output filtered waveform by selecting from one of said multiple filtered complex waveforms which have a least amount of differences in a predetermined frequency range;
- and
- wherein said selected final output filtered waveform has a plurality of final frequency bins, output of said plurality of final frequency bins are respectively output to each of said plurality of wave signal emitters.
6 more elements
A method of design or manufacture comprising:
- determining an order/size of a wavelet transform based on a plurality of wavelet transform order/size factors, wherein said plurality of wavelet transform order/size factors comprises:
- determining a target sampling rate, wherein said target sampling rate determines a highest frequency of interest;
- determining a number of frequency bins based on said target sampling rate;
- determining an order of a selected wavelet transform based on a preliminary frequency bin analysis, wherein said frequency bin analysis is based on a determination of a preliminary reduced number of wavelet frequency bins as determined by a frequency bin reduction analysis;
- performing a wavelet transform on an input waveform based on said determining an order/size of a wavelet transform step;
- and
- determining filtering in a wavelet domain where selected filters are determined based on an analysis of each frequency bin contribution to recreating said input waveform that was input into said wavelet transform at said performing a wavelet transform step.
4 more elements
A method comprising;
- configuring a device to produce a desired complex waveform over a desired range of frequencies associated with a plurality of wave signal emitters;
- wherein configuring said device comprises:
- configuring a control system to perform wavelet transforms over a desired range of frequencies;
- using filtering control processing based on frequency segmentation to reduce a number of frequencies;
- determining a size of a wavelet transform based on determining a sampling rate;
- comparing multiple filtered complex waveforms based on frequency bin analysis, reduction of frequency bins for each different multiple filtered complex waveform, and comparison of differences between a first input waveform and each of said multiple filtered complex waveforms;
- selecting a final output filtered waveform by selecting from one of said multiple filtered complex waveforms which have a least amount of differences m a predetermined frequency range;
- and
- using a plurality of frequency bins to select said plurality of wave signal emitters.
6 more elements
Dependencies are inferred from the claim text.