Patents by Inventor David E. Majchrzak
David E. Majchrzak 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: 7834713Abstract: A method for controlling a synthesized local oscillator (SLO) includes: receiving a control input specifying a desired SLO output; receiving reference clock signal; generating a predefined set of dynamic clock signals from the reference clock signal; selecting a dynamic clock signal from the predefined set of dynamic clock signals in response to the control input; using the dynamic clock signal as an input to a direct digital synthesizer (DDS) module to generate a DDS output signal; selecting a DDS output band in response to the control input, the DDS output band including one of a baseband and an alias band; and processing the DDS output band to generate the SLO output.Type: GrantFiled: February 29, 2008Date of Patent: November 16, 2010Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Stephen D. Larkin, Jeffrey H. Blake, Joseph F. Xavier, David E. Majchrzak
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Publication number: 20100079173Abstract: A method for controlling a synthesized local oscillator (SLO) includes: receiving a control input specifying a desired SLO output; receiving reference clock signal; generating a predefined set of dynamic clock signals from the reference clock signal; selecting a dynamic clock signal from the predefined set of dynamic clock signals in response to the control input; using the dynamic clock signal as an input to a direct digital synthesizer (DDS) module to generate a DDS output signal; selecting a DDS output band in response to the control input, the DDS output band including one of a baseband and an alias band; and processing the DDS output band to generate the SLO output.Type: ApplicationFiled: February 29, 2008Publication date: April 1, 2010Applicant: ITT Manufacturing Enterprises, Inc.Inventors: Stephen D. Larkin, Jeffrey H. Blake, Joseph F. Xavier, David E. Majchrzak
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Patent number: 7453922Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: GrantFiled: March 14, 2002Date of Patent: November 18, 2008Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Patent number: 7376175Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: GrantFiled: November 8, 2002Date of Patent: May 20, 2008Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mizra Cifric, Ian N. Dunn, Michael J. Vinskus
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Patent number: 7327780Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: GrantFiled: March 14, 2002Date of Patent: February 5, 2008Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Patent number: 7210062Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: GrantFiled: March 14, 2002Date of Patent: April 24, 2007Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Patent number: 7110437Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a digital signal processor (“DSP”) that processes user waveforms. The DSP has an associated memory and an associated direct memory access (“DMA”) controller that controls access to that memory. A programmable logic device (“PLD”) is coupled to the DMA controller and configures it to move data relating to user waveform characteristics from the memory to a buffer external to the DSP.Type: GrantFiled: March 14, 2002Date of Patent: September 19, 2006Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Patent number: 7110440Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: GrantFiled: March 14, 2002Date of Patent: September 19, 2006Assignee: Mercury Computer Systems, Inc.Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Publication number: 20030231702Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: November 8, 2002Publication date: December 18, 2003Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Publication number: 20030202566Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: March 14, 2002Publication date: October 30, 2003Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Publication number: 20030202559Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: March 14, 2002Publication date: October 30, 2003Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, Paul E. Cantrell, Frank P. Lauginiger, David E. Majchrzak, Mirza Cifric, William J. Jenkins, Ian N. Dunn, Michael J. Vinskus
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Publication number: 20030198197Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: March 14, 2002Publication date: October 23, 2003Inventors: John H. Oates, Frank P. Lauginiger, Steven R. Imperiali, David E. Majchrzak, Alden J. Fuchs, Paul E. Cantrell, Kathleen J. Jacques, Mirza Cifric, Jonathan E. Greene, Ian N. Dunn, William J. Jenkins, Michael J. Vinskus
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Publication number: 20030191887Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: March 14, 2002Publication date: October 9, 2003Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus
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Publication number: 20030128739Abstract: The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third procesing element produces estimates of the user transmitted symbols as a function of the R-matrix.Type: ApplicationFiled: March 14, 2002Publication date: July 10, 2003Inventors: John H. Oates, Steven R. Imperiali, Alden J. Fuchs, Kathleen J. Jacques, Jonathan E. Greene, William J. Jenkins, Frank P. Lauginiger, David E. Majchrzak, Paul E. Cantrell, Mirza Cifric, Ian N. Dunn, Michael J. Vinskus