Incremental digital filter
First Claim
1. A data processing system comprising:
- input means for generating at least one incremental time related input signal andincremental Fourier transform processor means for generating an incremental frequency related processed signal in response to the incremental time related input signal.
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Abstract
An incremental digital filter provides high speed and low cost capability such as for performing fast Fourier transforms (FFTs), correlations, convolutions, and other digital filter operations. One configuration operates at microwave sample rates, computing a complete 512-point FFT in 0.2 microseconds for an effective sample rate of 2.56 gigahertz. High speed and low cost are derived from a parallel pipeline architecture in combination with incremental processing. Parallel pipeline architecture provides extremely high speed while the incremental mechanization provides a simple arrangement with a low component count for low cost. The incremental nature of the processor provides an integrating type mechanization, where integration-after-transformation yields high processing gain for signal-to-noise-ratio enhancement.
High data rate input and output mechanizations are provided to accommodate the high processing rates. An improved input mechanization involves analog signal to incremental digital conversion. An improved output mechanization involves integration after filtering for data rate reductions and for signal enhancement and also involves a bus output structure for multiplexing of output parameters.
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Citations
39 Claims
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1. A data processing system comprising:
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input means for generating at least one incremental time related input signal and incremental Fourier transform processor means for generating an incremental frequency related processed signal in response to the incremental time related input signal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. A data processing system comprising:
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input means for generating at least one incremental time related input signal and incremental fast Fourier transform processor means for performing a fast Fourier transform computation to generate an incremental frequency related processed signal in response to the incremental time related input signal.
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10. A data processing system comprising:
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input means for generating at least one incremental time related input signal and incremental Fourier transform processor means for generating an incremental frequency related processed signal in response to the incremental time related input signal;
said incremental Fourier transform processor means including pipeline Fourier processor means for performing a pipeline Fourier processing computation to generate the incremental frequency related processed signal in response to the incremental time related input signal. - View Dependent Claims (15)
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11. A data processing system comprising:
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input means for generating at least one incremental time related input signal and incremental Fourier transform processor means for generating a frequency related processed number in response to the incremental time related input signal, said processor means including a. means for storing a constant number; b. means for storing the frequency related processed number; c. means for generating at least one incremental product signal in response to an incremental product of the constant number from said constant number storing means and the incremental time related input signal from said input means; and d. means for updating the frequency related processed number from said processed number storing means in response to the incremental product signal from said incremental product signal generating means. - View Dependent Claims (12, 13, 14)
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16. A data processing system comprising:
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input means for generating at least one incremental time related input signal; incremental Fourier transform processor means for generating at least one incremental frequency related processed signal in response to the incremental input signal; and post processor means for generating at least one incremental post processed signal in response to the incremental frequency related processed signal from said incremental Fourier transform processor means. - View Dependent Claims (17)
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18. A data processing system comprising:
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input means for generating incremental time related input signal samples; incremental Fourier transform processor means for generating incremental frequency related processed signal samples in response to the incremental input signal samples from said input means; and coherent means for generating coherent whole number signal samples in respone to the incremental frequency related processed signal samples from said processor means.
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19. A data processing system comprising:
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input means for generating incremental time related input signal samples; incremental Fourier transform processor means for generating incremental frequency related processed signal samples in response to the incremental input signal samples from said input means; and noncoherent means for generating noncoherent whole number signal samples in response to the incremental frequency related processed signal samples from said processor means.
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20. A digital data processing system comprising:
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transducer means for generating analog transducer signals in response to sensed analog input signals; signal processor means for generating processed analog signals in response to the analog transducer signals from said transducer means; converter means for generating incremental input signals in response to the processed analog signals from said signal processor means; transform processor means for generating frequency domain incremental signals in response to the incremental input signals from said converter means, said transform processor means including a. butterfly processing circuits for generating butterfly incremental signals in response to the incremental input signals and b. means for connecting said butterfly processing circuits to generate the frequency domain incremental signals in response to the incremental input signals from said converter means; and output processor means for generating whole number digital output signals in response to the frequency domain incremental signals from said transform processor means. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A filtering system comprising:
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input means for generating a plurality of time domain signal samples; filter means for generating a plurality of frequency domain signal samples in response to the time domain input signal samples; and integrating means for generating a plurality of integrated signal samples in response to the frequency domain signal samples.
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34. A filtering system comprising:
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input means for generating a plurality of time domain signal samples; Fourier transform means for generating a first plurality of Fourier transform frequency domain signal samples related to a first Fourier transform and a second plurality of Fourier transform frequency domain signal samples related to a second Fourier transform in response to the time domain signal samples from said input means; and integrating means for summing each of a plurality of said first plurality of Fourier transform frequency domain signal samples with a related one of said second plurality of Fourier transform frequency domain signal samples to generate a plurality of integrated Fourier transform frequency domain signal samples.
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35. A filtering system comprising:
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input means for generating a plurality of incremental time domain signal samples; incremental filter means for generating a plurality of incremental frequency domain signal samples in response to the incremental time domain input signal samples; and integrating means for generating a plurality of integrated signal samples in response to the incremental frequency domain signal samples.
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36. A filtering system comprising:
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input means for generating incremental time related signal samples and incremental processor means for generating incremental frequency related signal samples in response to the incremental time related signal samples.
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37. A filtering system comprising:
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input means for generating incremental time related signal samples and incremental Fourier transform processor means for generating incremental frequency related signal samples in response to the incremental time related signal samples.
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38. A filtering system comprising:
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input means for generating time related signal samples; incremental processor means for generating incremental frequency related signal samples in response to the incremental time related signal samples; and integration means for generating whole number digital signal samples in response to the incremental frequency related signal samples.
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39. A Fourier transform processor for generating Fourier transformed incremental output signals in response to incremental input signals, said Fourier transform processor comprising:
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incremental means for incrementally generating the transformed incremental output signals in response to the incremental input signals and integration means for generating digital whole number output signals in response to the incremental output signals.
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Specification