Patents by Inventor Shimen K. Claxton
Shimen K. Claxton 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: 6813320Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels.Type: GrantFiled: June 28, 2000Date of Patent: November 2, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Bert K. Oyama, Eric L. Upton, Barry R. Allen, Mark Kintis, Andrew D. Smith, Craig R. Talbott, David J. Brunone, Donald R. Martin, William M. Skones, Ronald P. Smith, Vincent C. Moretti
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Patent number: 6804308Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels.Type: GrantFiled: June 28, 2000Date of Patent: October 12, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Bert K. Oyama, Mark Kintis, Andrew D. Smith, Craig R. Talbott, Donald R. Martin, William M. Skones, Vincent C. Moretti
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Patent number: 6801583Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band.Type: GrantFiled: June 28, 2000Date of Patent: October 5, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Bert K. Oyama, Mark Kintis, Andrew D. Smith, Craig R. Talbott, Donald R. Martin, William M. Skones, Ronald P. Smith, Vincent C. Moretti
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Patent number: 6798848Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels.Type: GrantFiled: June 28, 2000Date of Patent: September 28, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Bert K. Oyama, Mark Kintis, Andrew D. Smith, Craig R. Talbott, Donald R. Martin, William M. Skones, Ronald P. Smith, Vincent C. Moretti
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Patent number: 6741847Abstract: A frequency down-converter (18) for a receiver (10) in a wireless telecommunications system. The down-converter (18) is capable of simultaneously processing a plurality of signal channels without increased signal distortion over a relatively wide bandwidth. The frequency down-converter (18) employs a suitable mixer (28), bandpass filter (32), attenuator (34) and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband width. In one embodiment, the bandpass filter passes a frequency band at 25 MHz or above. The frequency down-converter (18) generates the IF signal in a single step down-conversion process, or generates the IF signal and then a baseband signal in a two step down-conversion process.Type: GrantFiled: June 28, 2000Date of Patent: May 25, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Mark Kintis, Craig R. Talbott
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Patent number: 6735421Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels.Type: GrantFiled: June 28, 2000Date of Patent: May 11, 2004Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Barry R. Allen, Mark Kintis, Andrew D. Smith, Craig R. Talbott, David J. Brunone, Donald R. Martin, William M. Skones, Vincent C. Moretti
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Patent number: 6631255Abstract: A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels.Type: GrantFiled: June 28, 2000Date of Patent: October 7, 2003Assignee: Northrop Grumman CorporationInventors: Shimen K. Claxton, Bert K. Oyama, Barry R. Allen, Mark Kintis, Andrew D. Smith, Craig R. Talbott, David J. Brunone, Donald R. Martin, William M. Skones, Vincent C. Moretti
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Publication number: 20020172231Abstract: A time multiplexed multiple carrier transmitter includes a first data encoder that produces first transmit data and a second data encoder that produces second transmit data. In addition, the transmitter includes a digital multiplexer coupled to the first and the second data encoders. The digital multiplexer provides a transmit signal output. A transmit frequency upconverter coupled to a power amplifier and the transmit signal output provides a final upconversion (or direct upconversion) to a transmit frequency for each channel. The transmitter also includes a multiplexer control circuit coupled to the digital multiplexer through a multiplexer control input. The multiplexer control circuit produces a multiplexer control signal on the multiplex control input that selects between the first and second data encoders according to a transmit schedule. The transmit schedule determines when, at the frequency at which, the transmitter selects and transmits data from each data encoder.Type: ApplicationFiled: April 12, 2001Publication date: November 21, 2002Inventors: Shimen K. Claxton, Flavia S. Fong, Mark Kintis, Donald R. Martin, Andrew D. Smith, Eric L. Upton, Brian P. Wong