Patents by Inventor David Jennings Wicker, JR.
David Jennings Wicker, JR. 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: 9674007Abstract: Systems and methods are disclosed herein to provide automatic identification of radio frequency (RF) transmitter chains during the testing of wireless data communication devices and systems, including Multiple Input Multiple Output (MIMO) devices and systems utilizing beamforming. In accordance with one or more embodiments, a signal analysis function is disclosed that identifies the ordinal index of each MIMO RF transmitter chain associated with a Device Under Test (DUT) using the Cyclic Shift Delay (CSD) imposed on the transmitted MIMO signal. Such a system may offer improved capabilities such as automated detection of mis-cabled test setups, automated recovery from mis-cabling, and automated adaptation of transmitted test signals to counteract the effects of mis-cabling.Type: GrantFiled: January 5, 2016Date of Patent: June 6, 2017Assignee: IxiaInventor: David Jennings Wicker, Jr.
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Patent number: 9369369Abstract: Systems and methods are disclosed herein to provide communication test systems for the testing of packet data communication devices, systems and networks. According to one aspect of the subject matter described herein, a test system containing an integrated traffic, protocol and waveform analyzer is disclosed that includes a traffic generator/analyzer and a protocol engine that triggers a waveform analyzer to analyze the signal waveform of a device under test at a predetermined point. Such a test system may offer improved capabilities such as a more selective and accurate measurement of complex signal waveforms, more automated measurements of waveforms pertaining to wireless communication data streams, and more rapid identification and measurement of waveforms corresponding to errored packets.Type: GrantFiled: March 5, 2013Date of Patent: June 14, 2016Assignee: IXIAInventors: Lester Noel Stott, David Jennings Wicker, Jr., Jeffrey Dean Marker, Alexander David Rekow, Timothy Earl Bennington-Davis, Thomas Alexander
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Patent number: 9325533Abstract: Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that regenerates a representation of the original transmitted signal from the received digital bitstream and selectively applies it to refine and improve channel estimation and signal equalization calculations using the data symbols contained within received frames. Such a system may offer improved capabilities such as more accurate signal reception, reduced bit error ratio, and improved Multi-User MIMO (MU-MIMO) reception.Type: GrantFiled: October 21, 2014Date of Patent: April 26, 2016Assignee: IXIAInventors: David Jennings Wicker, Jr., Thomas Alexander
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Patent number: 9270497Abstract: Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that utilizes data payload portions of received wireless packets to calculate estimates of the radio frequency (RF) channel traversed by these packets, and iteratively refines and improves these estimates by selectively utilizing successive received packets according to the application of certain metrics. Such a system may offer improved capabilities such as: more accurate signal reception, reduced bit error ratio, and better reception of short data packets.Type: GrantFiled: June 18, 2014Date of Patent: February 23, 2016Assignee: IxiaInventors: David Jennings Wicker, Jr., Thomas Alexander
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Publication number: 20150372842Abstract: Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that utilizes data payload portions of received wireless packets to calculate estimates of the radio frequency (RF) channel traversed by these packets, and iteratively refines and improves these estimates by selectively utilizing successive received packets according to the application of certain metrics. Such a system may offer improved capabilities such as: more accurate signal reception, reduced bit error ratio, and better reception of short data packets.Type: ApplicationFiled: June 18, 2014Publication date: December 24, 2015Inventors: David Jennings Wicker, JR., Thomas Alexander
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Patent number: 9083454Abstract: Systems and methods are disclosed herein to provide communication test systems for the testing of multiple-input multiple-output (MIMO) radio frequency wireless data communication devices, systems and networks, including Multi-User MIMO (MU-MIMO) devices and systems. In accordance with one or more embodiments, a test system containing an integrated MIMO signal analyzer is disclosed that includes a protocol engine operative in conjunction with a waveform generator and waveform analyzer that analyzes the signal waveform of a device under test. Such a test system may offer improved capabilities such as a simpler and more flexible measurement of complex MIMO signal waveforms, more automated measurements of MIMO waveforms including beamforming functions, and more accurate measurement of the efficiency of MIMO related functions such as channel estimation, transmit precoding and beamforming.Type: GrantFiled: October 1, 2013Date of Patent: July 14, 2015Assignee: IxiaInventors: David Jennings Wicker, Jr., Lester Noel Stott, Jeffrey Dean Marker, Alexander David Rekow, Thomas Alexander
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Publication number: 20150124911Abstract: Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that regenerates a representation of the original transmitted signal from the received digital bitstream and selectively applies it to refine and improve channel estimation and signal equalization calculations using the data symbols contained within received frames. Such a system may offer improved capabilities such as more accurate signal reception, reduced bit error ratio, and improved Multi-User MIMO (MU-MIMO) reception.Type: ApplicationFiled: October 21, 2014Publication date: May 7, 2015Inventors: David Jennings Wicker, JR., Thomas Alexander
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Publication number: 20150110231Abstract: Systems and methods are disclosed herein to provide improved clock synchronization between wireless data communication transmitters and receivers, including Orthogonal Frequency Division Multiplexing (OFDM) communication systems. In accordance with one or more embodiments, a clock synchronization system is disclosed that includes an adaptive threshold function operative in conjunction with a synchronizer that adjusts the frequency and phase of a receive clock oscillator. Such a synchronization system may offer improved capabilities such as resistance to radio frequency (RF) channel impairments and noise, rejection of mis-decoded clock synchronization signals, and handling of multiple transmitters.Type: ApplicationFiled: October 18, 2013Publication date: April 23, 2015Inventors: Thomas Alexander, David Jennings Wicker, JR.
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Publication number: 20150092824Abstract: Systems and methods are disclosed herein to provide communication test systems for the testing of multiple-input multiple-output (MIMO) radio frequency wireless data communication devices, systems and networks, including Multi-User MIMO (MU-MIMO) devices and systems. In accordance with one or more embodiments, a test system containing an integrated MIMO signal analyzer is disclosed that includes a protocol engine operative in conjunction with a waveform generator and waveform analyzer that analyzes the signal waveform of a device under test. Such a test system may offer improved capabilities such as a simpler and more flexible measurement of complex MIMO signal waveforms, more automated measurements of MIMO waveforms including beamforming functions, and more accurate measurement of the efficiency of MIMO related functions such as channel estimation, transmit precoding and beamforming.Type: ApplicationFiled: October 1, 2013Publication date: April 2, 2015Applicant: IXIAInventors: DAVID JENNINGS WICKER, JR., LESTER NOEL STOTT, JEFFREY DEAN MARKER, ALEXANDER DAVID REKOW, THOMAS ALEXANDER
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Publication number: 20140254647Abstract: Systems and methods are disclosed herein to provide communication test systems for the testing of packet data communication devices, systems and networks. According to one aspect of the subject matter described herein, a test system containing an integrated traffic, protocol and waveform analyzer is disclosed that includes a traffic generator/analyzer and a protocol engine that triggers a waveform analyzer to analyze the signal waveform of a device under test at a predetermined point. Such a test system may offer improved capabilities such as a more selective and accurate measurement of complex signal waveforms, more automated measurements of waveforms pertaining to wireless communication data streams, and more rapid identification and measurement of waveforms corresponding to errored packets.Type: ApplicationFiled: March 5, 2013Publication date: September 11, 2014Inventors: Lester Noel Stott, David Jennings Wicker, JR., Jeffrey Dean Marker, Alexander David Rekow, Timothy Earl Bennington-Davis, Thomas Alexander