Patents by Inventor Robert W. Lowdermilk
Robert W. Lowdermilk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8744025Abstract: Methods, systems and other embodiments associated with pre-processing a signal for spectral analysis are presented. A system for pre-processing a digital input signal includes a digital down converter (DDC), an interpolator, and a series of down samplers. The DDC modulates the digital input signal to create a down converted signal. The interpolator re-samples the down converted signal to produce a re-sampled signal. The series of down samplers produces down sampled signals. The multiplexer selects one of the digital input signal, the down converted signal, and the down sampled signals and routes the selected signal to an output line.Type: GrantFiled: August 30, 2010Date of Patent: June 3, 2014Assignee: BAE Systems Information Solutions Inc.Inventors: Robert W. Lowdermilk, Dragan Vuletic, Fredric J. Harris, Michael Tammen
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Patent number: 8717006Abstract: A system and method for filtering an input signal with at least a first and a second octave portions is presented. A proportional bandwidth filter system includes a bandwidth reducing filter, a down-sampler, and first and second octave filters. The bandwidth reducing filter reduces the bandwidth of the input signal and the down-sampler rolls the second octave portion represented in the reduced bandwidth signal to a top octave portion of a down-sampled signal. The first and second octave filters are comprised of a plurality of proportional bandwidth filters. The first octave filter partitions and converts the first octave portion of the input signal into output signals representing the frequency spectra of the first octave of the input signal. Similarly, the second octave filter generates outputs representing the spectra of the second octave portion of the input signal represented as the top octave portion of a down-sampled signal.Type: GrantFiled: July 5, 2011Date of Patent: May 6, 2014Assignee: BAE Systems National Security Solutions Inc.Inventors: Alexis B. Allegra, Robert W. Lowdermilk, Dragan Vuletic, Fredric J. Harris
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Patent number: 8514919Abstract: Systems and other embodiments associated with synthetic instrumentation are presented. A reconfigurable synthetic instrumentation unit comprises an input module, with dual input/output ports and conditioning logic to condition an input signal. An RF down converter selectively down converts the conditioned input signal. A sampled RF down converter selectively samples the conditioned input signal. A pair of narrowband A/D converters are configured to convert one of the conditioned signal, the down converted signal and the sampled signal to produce a narrowband digital signal. A pair of broadband A/D converters convert at least one of the conditioned signal, the down converted signal and the sampled signal to produce a broadband digital signal. Signal processing logic selectively performs digital signal processing on the broadband digital signal or the narrow band digital signal.Type: GrantFiled: August 25, 2010Date of Patent: August 20, 2013Assignee: BAE Systems National Security Solutions Inc.Inventors: Anthony J. Estrada, Dana C. Ford, Tae S. Kim, Robert W. Lowdermilk, Dragan Vuletic
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Publication number: 20130013262Abstract: A system and method for filtering an input signal with at least a first and a second octave portions is presented. A proportional bandwidth filter system includes a bandwidth reducing filter, a down-sampler, and first and second octave filters. The bandwidth reducing filter reduces the bandwidth of the input signal and the down-sampler rolls the second octave portion represented in the reduced bandwidth signal to a top octave portion of a down-sampled signal. The first and second octave filters are comprised of a plurality of proportional bandwidth filters. The first octave filter partitions and converts the first octave portion of the input signal into output signals representing the frequency spectra of the first octave of the input signal. Similarly, the second octave filter generates outputs representing the spectra of the second octave portion of the input signal represented as the top octave portion of a down-sampled signal.Type: ApplicationFiled: July 5, 2011Publication date: January 10, 2013Applicant: BAE SYSTEMS NATIONAL SECURITY SOLUTIONS INC.Inventors: Alexis B. Allegra, Robert W. Lowdermilk, Dragan Vuletic, Fredric J. Harris
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Publication number: 20120020397Abstract: Systems and other embodiments associated with synthetic instrumentation are presented. A reconfigurable synthetic instrumentation unit comprises an input module, with dual input/output ports and conditioning logic to condition an input signal. An RF down converter selectively down converts the conditioned input signal. A sampled RF down converter selectively samples the conditioned input signal. A pair of narrowband A/D converters are configured to convert one of the conditioned signal, the down converted signal and the sampled signal to produce a narrowband digital signal. A pair of broadband A/D converters convert at least one of the conditioned signal, the down converted signal and the sampled signal to produce a broadband digital signal. Signal processing logic selectively performs digital signal processing on the broadband digital signal or the narrow band digital signal.Type: ApplicationFiled: August 25, 2010Publication date: January 26, 2012Applicant: BAE SYSTEMS NATIONAL SECURITY SOLUTIONS INC.Inventors: Anthony J. Estrada, Dana C. Ford, Tae S. Kim, Robert W. Lowdermilk, Dragan Vuletic
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Publication number: 20110206163Abstract: Methods, systems and other embodiments associated with pre-processing a signal for spectral analysis are presented. A system for pre-processing a digital input signal includes a digital down converter (DDC), an interpolator, and a series of down samplers. The DDC modulates the digital input signal to create a down converted signal. The interpolator re-samples the down converted signal to produce a re-sampled signal. The series of down samplers produces down sampled signals. The multiplexer selects one of the digital input signal, the down converted signal, and the down sampled signals and routes the selected signal to an output line.Type: ApplicationFiled: August 30, 2010Publication date: August 25, 2011Applicant: BAE SYSTEMS NATIONAL SECURITY SOLUTIONS INC.Inventors: Robert W. Lowdermilk, Dragan Vuletic, Fredric J. Harris, Michael Tammen
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Patent number: 7071994Abstract: A method and system for sending and receiving binary bit stream in a composite video signal, such as a NTSC signal. The binary bit stream is modulated according to quadrature amplitude modulation, converted to analog and translated to an intermediate frequency relative to the composite video signal and the associated sync pulses, and combined with the composite video signal. At reception of a composite video signal that includes the modulated bit stream, the sync pulses of the composite video signal are determined by extracting the composite video signal from the modulated bit stream. Also, the modulated bit stream is extracted from the composite video signal, separated into its component parts based on the sync pulses, and combined into a binary bit stream.Type: GrantFiled: July 19, 2001Date of Patent: July 4, 2006Assignee: Telisar CorporationInventors: Frederic Joel Harris, Robert W. Lowdermilk, Dragan Vuletic, Steven C. Weiss
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Publication number: 20020085118Abstract: A method and system for sending and receiving binary bit stream in a composite video signal, such as a NTSC signal. The binary bit stream is modulated according to quadrature amplitude modulation, converted to analog and translated to an intermediate frequency relative to the composite video signal and the associated sync pulses, and combined with the composite video signal. At reception of a composite video signal that includes the modulated bit stream, the sync pulses of the composite video signal are determined by extracting the composite video signal from the modulated bit stream. Also, the modulated bit stream is extracted from the composite video signal, separated into its component parts based on the sync pulses, and combined into a binary bit stream.Type: ApplicationFiled: July 19, 2001Publication date: July 4, 2002Inventors: Frederic Joel Harris, Robert W. Lowdermilk, Dragon Vuletic, Steven C. Weiss
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Publication number: 20020085117Abstract: A method and system for sending and receiving binary bit stream in a composite video signal, such as a NTSC signal. The binary bit stream is modulated according to quadrature amplitude modulation, converted to analog and translated to an intermediate frequency relative to the composite video signal and the associated sync pulses, and combined with the composite video signal. At reception of a composite video signal that includes the modulated bit stream, the sync pulses of the composite video signal are determined by extracting the composite video signal from the modulated bit stream. Also, the modulated bit stream is extracted from the composite video signal, separated into its component parts based on the sync pulses, and combined into a binary bit stream.Type: ApplicationFiled: June 25, 2001Publication date: July 4, 2002Inventors: Frederic Joel Harris, Robert W. Lowdermilk, Dragan Vuletic