Patents by Inventor Gregory Rawlins
Gregory Rawlins 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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Publication number: 20070060076Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: November 15, 2006Publication date: March 15, 2007Applicant: ParkerVision, Inc.Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20070026821Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: August 23, 2006Publication date: February 1, 2007Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20070026822Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: August 24, 2006Publication date: February 1, 2007Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20060292999Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: August 30, 2006Publication date: December 28, 2006Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20060293000Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: August 30, 2006Publication date: December 28, 2006Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20060280231Abstract: Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion and de-spreading, and Early/Late receivers utilizing unified down-conversion and de-spreading, and combinations and applications of same. Additionally, applications are included for limiting spectral growth during unified up-conversion and spreading of a baseband signal.Type: ApplicationFiled: April 17, 2006Publication date: December 14, 2006Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Charles Clements, Robert Cook, Joseph Hamilla, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins, Gregory Silver
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Publication number: 20060198474Abstract: Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.Type: ApplicationFiled: March 28, 2006Publication date: September 7, 2006Applicant: Parker Vision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20060159005Abstract: The present invention provides an approach for quadrature signal generation, which does not require orthogonal reference signals or nearly orthogonal reference signals as an input or given condition. The techniques provided herein can utilize a reference phase shift less than 90° but greater than 0°, along with an inversion to create orthogonal signals. The techniques provided here reduce the number of critical manipulations required from a hardware perspective.Type: ApplicationFiled: October 21, 2005Publication date: July 20, 2006Inventors: Gregory Rawlins, David Sorrells, Greg Milne, Mike Rawlins
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Publication number: 20060104384Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: October 21, 2005Publication date: May 18, 2006Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20060099919Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.Type: ApplicationFiled: October 24, 2005Publication date: May 11, 2006Inventors: David Sorrells, Gregory Rawlins, Michael Rawlins
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Publication number: 20060083329Abstract: Systems and methods for utilizing universal frequency translators within gated energy transfer systems for phase detection and/or frequency detection. Phase and/or frequency detection can be utilized for comparing a higher frequency reference signal with a lower frequency local oscillator signal. Phase and/or frequency detection can also be utilized for phase locking and/or frequency locking. The systems and methods can be utilized to simultaneously downconvert a reference signal for phase and/or frequency comparison and/or for locking, at lower Phase and/or frequency detection can be utilized for frequencies, which is easier to design and which requires less expensive electrical components.Type: ApplicationFiled: December 2, 2005Publication date: April 20, 2006Applicant: ParkerVision Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20060019617Abstract: Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In embodiments, up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used in the frequency modulation or phase modulation implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate a bias signal. The output of the switch is filtered, and the desired harmonic is output.Type: ApplicationFiled: October 12, 2004Publication date: January 26, 2006Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20050272395Abstract: Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down-converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal by transferring energy from the EM signal at the aliasing rate. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.Type: ApplicationFiled: July 5, 2005Publication date: December 8, 2005Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Michael Rawlins, Gregory Rawlins
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Publication number: 20050227639Abstract: Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In embodiments, up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used in the frequency modulation or phase modulation implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate a bias signal. The output of the switch is filtered, and the desired harmonic is output.Type: ApplicationFiled: October 12, 2004Publication date: October 13, 2005Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20050215207Abstract: A method and system is described wherein a signal with a lower frequency is up-converted to a higher frequency. In one embodiment, the higher frequency signal is used as a stable frequency and phase reference. In another embodiment, the invention is used as a transmitter. The up-conversion is accomplished by controlling a switch with an oscillating signal, the frequency of the oscillating signal being selected as a sub-harmonic of the desired output frequency. When the invention is being used as a frequency or phase reference, the oscillating signal is not modulated, and controls a switch that is connected to a bias signal. When the invention is being used in the frequency modulation (FM) or phase modulation (PM) implementations, the oscillating signal is modulated by an information signal before it causes the switch to gate the bias signal.Type: ApplicationFiled: March 1, 2005Publication date: September 29, 2005Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20050193049Abstract: A fast correlator transform (FCT) algorithm and methods and systems for implementing same, correlate an encoded data word (X0-XM-1) with encoding coefficients (C0-CM-1), wherein each of (X0-XM-1) is represented by one or more bits and each said coefficient is represented by one or more bits, wherein each coefficient has k possible states, and wherein M is greater than 1. In accordance with the invention, X0 is multiplied by each state (C0(0) through C0(k-1)) of the coefficient C0, thereby generating results X0C0(0) through X0C0(k-1). This is repeating for data bits (X1-XM-1) and corresponding coefficients (C1-CM-1), respectively. The results are grouped into N groups. Members of each of the N groups are added to one another, thereby generating a first layer of correlation results. The first layer of results is grouped and the members of each group are summed with one another to generate a second layer of results. This process is repeated as necessary until a final layer of results is generated.Type: ApplicationFiled: April 18, 2005Publication date: September 1, 2005Applicant: ParkerVision, Inc.Inventors: Gregory Rawlins, Michael Rawlins, David Sorrells
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Publication number: 20050185741Abstract: A fast correlator transform (FCT) algorithm and methods and systems for implementing same, correlate an encoded data word (X0-XM-1) with encoding coefficients (C0-CM-1), wherein each of (X0-XM-1) is represented by one or more bits and each said coefficient is represented by one or more bits, wherein each coefficient has k possible states, and wherein M is greater than 1. In accordance with the invention, X0 is multiplied by each state (C0(0) through C0(k-1)) of the coefficient C0, thereby generating results X0C0(0) through X0C0(k-1). This is repeating for data bits (X1-XM-1) and corresponding coefficients (C1-CM-1), respectively. The results are grouped into N groups. Members of each of the N groups are added to one another, thereby generating a first layer of correlation results. The first layer of results is grouped and the members of each group are summed with one another to generate a second layer of results. This process is repeated as necessary until a final layer of results is generated.Type: ApplicationFiled: April 18, 2005Publication date: August 25, 2005Applicant: ParkerVision, Inc.Inventors: Gregory Rawlins, Michael Rawlins, David Sorrells
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Publication number: 20050143042Abstract: Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnetic (EM) signal is also described herein. Down-converting a signal and improving receiver dynamic range is also described herein.Type: ApplicationFiled: February 17, 2005Publication date: June 30, 2005Applicant: ParkerVision, Inc.Inventors: David Sorrells, Michael Bultman, Robert Cook, Jonathan Jensen, Martin Johnson, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins, Robert Short, Jamison Young
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Publication number: 20050123025Abstract: Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal generator, a demodulation/modulation facilitation module, and a MAC interface. The WLAN receiver includes at least one universal frequency translation module that frequency down-converts a received EM signal. In embodiments, the UFT based receiver is configured in a multi-phase embodiment to reduce or eliminate re-radiation that is caused by DC offset. The WLAN transmitter includes at least one universal frequency translation module that frequency up-converts a baseband signal in preparation for transmission over the wireless LAN. In embodiments, the UFT based transmitter is configured in a differential and multi-phase embodiment to reduce carrier insertion and spectral growth.Type: ApplicationFiled: January 25, 2005Publication date: June 9, 2005Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins
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Publication number: 20050100115Abstract: A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal.Type: ApplicationFiled: December 20, 2004Publication date: May 12, 2005Inventors: David Sorrells, Michael Bultman, Robert Cook, Richard Looke, Charley Moses, Gregory Rawlins, Michael Rawlins