Patents by Inventor Craig E. Rupp
Craig E. Rupp 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: 9667390Abstract: A mechanism for determining an error vector magnitude EVMTD for a signal transmitted by a device under test (DUT). A receiver (typically an RF signal analyzer) produces a baseband signal in response to the signal transmission. An OFDM input signal (derived from the baseband signal) is accessed from memory. The OFDM input signal includes a sequence of time-domain OFDM input symbols. A reference signal is accessed from the memory. The reference signal includes a sequence of time-domain OFDM reference symbols. EVMTD is computed in the time domain based on a time-domain difference signal, i.e., a time-domain difference between the sequence of time-domain OFDM input symbols and the sequence of time-domain OFDM reference symbols. The error vector magnitude EVMTD is determined without transforming the sequence of time-domain OFDM input symbols to the frequency domain. The error vector magnitude EVMTD is related to a standard-defined composite EVM by a scalar multiple.Type: GrantFiled: April 17, 2014Date of Patent: May 30, 2017Assignee: NATIONAL INSTRUMENTS CORPORATIONInventors: I. Zakir Ahmed, Craig E. Rupp, Ramanujeya Lakshminarayan Narahari
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Patent number: 9332450Abstract: Method and system for a test process. The method may include performing tests on one or more units under test (UUTs). At least one test on one or more UUTs may be performed. A signal may be acquired from the UUT. A reference signal may be retrieved. The reference signal may be derived from a transmitted signal characteristic of the UUT. The signal may be analyzed with respect to the reference signal. Results, useable to characterize the one or more UUTs, from performing the at least one test on the one or more UUTs may be stored. The reference signal may be derived from an initial test and may be stored for subsequent retrieval. A respective reference signal may be retrieved for all UUTs of the one or more UUTs for a respective test. The signal may be a radio frequency signal. The UUT may be a wireless mobile device.Type: GrantFiled: February 25, 2015Date of Patent: May 3, 2016Assignee: National Instruments CorporationInventors: Craig E. Rupp, Gerardo Orozco Valdes, I. Zakir Ahmed, Vijaya Yajnanarayana
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Publication number: 20150304075Abstract: A mechanism for determining an error vector magnitude EVMTD for a signal transmitted by a device under test (DUT). A receiver (typically an RF signal analyzer) produces a baseband signal in response to the signal transmission. An OFDM input signal (derived from the baseband signal) is accessed from memory. The OFDM input signal includes a sequence of time-domain OFDM input symbols. A reference signal is accessed from the memory. The reference signal includes a sequence of time-domain OFDM reference symbols. EVMTD is computed in the time domain based on a time-domain difference signal, i.e., a time-domain difference between the sequence of time-domain OFDM input symbols and the sequence of time-domain OFDM reference symbols. The error vector magnitude EVMTD is determined without transforming the sequence of time-domain OFDM input symbols to the frequency domain. The error vector magnitude EVMTD is related to a standard-defined composite EVM by a scalar multiple.Type: ApplicationFiled: April 17, 2014Publication date: October 22, 2015Applicant: NATIONAL INSTRUMENTS CORPORATIONInventors: I. Zakir Ahmed, Craig E. Rupp, Ramanujeya Lakshminarayan Narahari
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Publication number: 20150172943Abstract: Method and system for a test process. The method may include performing tests on one or more units under test (UUTs). At least one test on one or more UUTs may be performed. A signal may be acquired from the UUT. A reference signal may be retrieved. The reference signal may be derived from a transmitted signal characteristic of the UUT. The signal may be analyzed with respect to the reference signal. Results, useable to characterize the one or more UUTs, from performing the at least one test on the one or more UUTs may be stored. The reference signal may be derived from an initial test and may be stored for subsequent retrieval. A respective reference signal may be retrieved for all UUTs of the one or more UUTs for a respective test. The signal may be a radio frequency signal. The UUT may be a wireless mobile device.Type: ApplicationFiled: February 25, 2015Publication date: June 18, 2015Inventors: Craig E. Rupp, Gerardo Orozco Valdes, I. Zakir Ahmed, Vijaya Yajnanarayana
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Patent number: 8995513Abstract: Device and method for outputting a leaked radio frequency (RF) signal useable for triggering devices under test (DUTs). The device may include a vector signal analyzer (VSA) which may also perform the method for triggering DUTs. The VSA may include a first component, configured to generate an RF signal, an input configured to receive RF signals transmitted from DUTs, and a received RF signal conditioning portion, each coupled to an internal switching portion. The VSA may be configured to generate the RF signal via the first component, leak the RF signal from the first component to the internal switching portion, generating a leaked RF signal, route the leaked RF signal to the input, bypassing the received RF signal conditioning portion and output the leaked RF signal which is useable to trigger DUTs via the input.Type: GrantFiled: November 11, 2013Date of Patent: March 31, 2015Assignee: National Instruments CorporationInventors: Roman R. Sandoval, Craig E. Rupp, William G. Reid, Jaffar Shah, Paulo A. Lamas De Anda
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Patent number: 8984342Abstract: Method and system for a test process. The method may include performing tests on one or more units under test (UUTs). At least one test on one or more UUTs may be performed. A signal may be acquired from the UUT. A reference signal may be retrieved. The reference signal may be derived from a transmitted signal characteristic of the UUT. The signal may be analyzed with respect to the reference signal. Results, useable to characterize the one or more UUTs, from performing the at least one test on the one or more UUTs may be stored. The reference signal may be derived from an initial test and may be stored for subsequent retrieval. A respective reference signal may be retrieved for all UUTs of the one or more UUTs for a respective test. The signal may be a radio frequency signal. The UUT may be a wireless mobile device.Type: GrantFiled: August 6, 2012Date of Patent: March 17, 2015Assignee: National Instruments CorporationInventors: Craig E. Rupp, Gerardo Orozco Valdes, I. Zakir Ahmed, Vijaya Yajnanarayana
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Patent number: 8725316Abstract: A robotic mower boundary sensing system includes a boundary driving circuit on a charging station transmitting an encoded signal on a boundary wire, a boundary sensor on a robotic mower and including an inductor receiving the encoded signal, and a vehicle control unit on the robotic mower receiving the encoded signal from the boundary sensor and decoding the signal and cross correlating the received signal to determine the distance of the boundary sensor from the boundary wire.Type: GrantFiled: December 21, 2012Date of Patent: May 13, 2014Assignee: Deere & CompanyInventors: Jeffrey S. Thompson, Craig E. Rupp
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Patent number: 8706339Abstract: A robotic mower boundary sensing system includes a boundary driving circuit on a charging station transmitting an encoded signal on a boundary wire, a boundary sensor on a robotic mower and including an inductor receiving the encoded signal, and a vehicle control unit on the robotic mower receiving the encoded signal from the boundary sensor and decoding the signal and cross correlating the received signal to determine the distance of the boundary sensor from the boundary wire.Type: GrantFiled: December 21, 2012Date of Patent: April 22, 2014Assignee: Deere & CompanyInventors: Jeffrey S. Thompson, Craig E Rupp
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Publication number: 20140040668Abstract: Method and system for a test process. The method may include performing tests on one or more units under test (UUTs). At least one test on one or more UUTs may be performed. A signal may be acquired from the UUT. A reference signal may be retrieved. The reference signal may be derived from a transmitted signal characteristic of the UUT. The signal may be analyzed with respect to the reference signal. Results, useable to characterize the one or more UUTs, from performing the at least one test on the one or more UUTs may be stored. The reference signal may be derived from an initial test and may be stored for subsequent retrieval. A respective reference signal may be retrieved for all UUTs of the one or more UUTs for a respective test. The signal may be a radio frequency signal. The UUT may be a wireless mobile device.Type: ApplicationFiled: August 6, 2012Publication date: February 6, 2014Inventors: Craig E. Rupp, Gerardo Orozco Valdes, I. Zakir Ahmed, Vijaya Yajnanarayana
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Publication number: 20140039826Abstract: System and method for testing units under test (UUTs). A test sequence is provided that includes an acquisition sequence and a processing sequence. The acquisition sequence may include a sequence of acquisition functions for performing acquisitions on one or more UUTs. The processing sequence may include a sequence of processing functions for processing measurement data resulting from the acquisitions. Each acquisition function may be performed, including performing a plurality of acquisitions, thereby generating respective measurement data sets, and storing the respective measurement data sets in order of the acquisitions. Each processing function may be performed, including retrieving and processing each respective measurement data set in order of acquisition. At least one processing function of the processing sequence may be performed concurrently with at least one acquisition function of the acquisition sequence.Type: ApplicationFiled: August 3, 2012Publication date: February 6, 2014Inventors: Gerardo Orozco Valdes, Michael J. Lyons, Norman J. Kirchner, JR., Craig E. Rupp
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Patent number: 8605774Abstract: A system and method for estimating a time delay introduced by an envelope tracking amplifier (ETA) of a transmitter. The ETA receives a first baseband signal that is generated by the transmitter and operates on the first baseband signal to produce an output signal. The receiver receives a second baseband signal in response to the transmitter's transmission of the output signal. The receiver generates a model signal that represents an estimate of the first baseband signal. The receiver computes a first time delay between the amplitude envelopes of the second baseband signal and the model signal. The receiver computes a second time delay between phase signals derived respectively from the second baseband signal and the model signal. The receiver estimates the time delay that is introduced by the ETA of the transmitter by subtracting the second time delay from the first time delay.Type: GrantFiled: March 25, 2011Date of Patent: December 10, 2013Assignee: National Instruments CorporationInventors: Craig E. Rupp, Gerardo Orozco Valdes, Abram H. Rose, IV
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Patent number: 8392044Abstract: A robotic mower boundary sensing system includes a boundary driving circuit on a charging station transmitting an encoded signal on a boundary wire, a boundary sensor on a robotic mower and including an inductor receiving the encoded signal, and a vehicle control unit on the robotic mower receiving the encoded signal from the boundary sensor and decoding the signal and cross correlating the received signal to determine the distance of the boundary sensor from the boundary wire.Type: GrantFiled: July 28, 2010Date of Patent: March 5, 2013Assignee: Deere & CompanyInventors: Jeffrey S. Thompson, Craig E. Rupp
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Patent number: 8374552Abstract: Testing a plurality of communication devices. A plurality of signals may be received from the plurality of communication devices. The plurality of signals may include a signal from each of the plurality of communication devices, where a first subset of the plurality of signals has a different frequency than a second subset of the plurality of signals. The received signals may be combined into a combined signal. The combined signal may be downconverted to a combined signal, e.g., by mixing the combined signal with an output from at least one local oscillator. The downconverting may generate a plurality of lower frequency signals, each corresponding to one of the plurality of received signals. Testing may be performed on each of the plurality of lower frequency signals.Type: GrantFiled: September 22, 2009Date of Patent: February 12, 2013Assignee: National Instruments CorporationInventors: Craig E. Rupp, Richard Henry Mace Keene
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Publication number: 20120243592Abstract: A system and method for estimating a time delay introduced by an envelope tracking amplifier (ETA) of a transmitter. The ETA receives a first baseband signal that is generated by the transmitter and operates on the first baseband signal to produce an output signal. The receiver receives a second baseband signal in response to the transmitter's transmission of the output signal. The receiver generates a model signal that represents an estimate of the first baseband signal. The receiver computes a first time delay between the amplitude envelopes of the second baseband signal and the model signal. The receiver computes a second time delay between phase signals derived respectively from the second baseband signal and the model signal. The receiver estimates the time delay that is introduced by the ETA of the transmitter by subtracting the second time delay from the first time delay.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventors: Craig E. Rupp, Gerardo Orozco Valdes, Abram H. Rose, IV
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Publication number: 20120029754Abstract: A robotic mower boundary sensing system includes a boundary driving circuit on a charging station transmitting an encoded signal on a boundary wire, a boundary sensor on a robotic mower and including an inductor receiving the encoded signal, and a vehicle control unit on the robotic mower receiving the encoded signal from the boundary sensor and decoding the signal and cross correlating the received signal to determine the distance of the boundary sensor from the boundary wire.Type: ApplicationFiled: July 28, 2010Publication date: February 2, 2012Inventors: Jeffrey S. Thompson, Craig E. Rupp
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Publication number: 20100077270Abstract: Testing a plurality of communication devices. A plurality of signals may be received from the plurality of communication devices. The plurality of signals may include a signal from each of the plurality of communication devices, where a first subset of the plurality of signals has a different frequency than a second subset of the plurality of signals. The received signals may be combined into a combined signal. The combined signal may be downconverted to a combined signal, e.g., by mixing the combined signal with an output from at least one local oscillator. The downconverting may generate a plurality of lower frequency signals, each corresponding to one of the plurality of received signals. Testing may be performed on each of the plurality of lower frequency signals.Type: ApplicationFiled: September 22, 2009Publication date: March 25, 2010Inventors: Craig E. Rupp, Richard Henry Mace Keene
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Patent number: 5907471Abstract: An energy storage assembly is made of an energy storage device, and electromagnetic interference (EMI) shield, and an adhesive positioned between the EMI shield and the energy storage device for affixing the energy storage device to a surface of the EMI shield. The EMI shield is a metal that is shaped to partially enclose an electrical component other than the energy storage device.Type: GrantFiled: December 29, 1997Date of Patent: May 25, 1999Assignee: Motorola, Inc.Inventors: Hitendra K. Patel, Craig E. Rupp, John C. Byrne