1
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins: Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation. ParkerVision, Sterne Kessler Goldstein & Fox PLLC, May 30, 2006: US07054296 (248 worldwide citation)

Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified ...


2
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins: Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same. ParkerVision, Sterne Kessler Goldstein & Fox PLLC, November 2, 2004: US06813485 (117 worldwide citation)

Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting and up-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 c ...


3
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Michael W Rawlins, Gregory S Rawlins: Method and circuit for down-converting a signal using a complementary FET structure for improved dynamic range. ParkerVision, Sterne Kessler Goldstein & Fox PLLC, February 3, 2004: US06687493 (99 worldwide citation)

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 accor ...


4
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins: Method and system for frequency up-conversion with variety of transmitter configurations. ParkerVision, Sterne Kessler Goldstein & Fox P L L C, April 1, 2003: US06542722 (97 worldwide citation)

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 accomp ...


5
Gregory S Rawlins, Michael W Rawlins, David F Sorrells: Method and apparatus for a parallel correlator and applications thereof. ParkerVision, Sterne Kessler Goldstein & Fox P L L C, June 19, 2007: US07233969 (93 worldwide citation)

A fast correlator transform (FCT) algorithm and methods and systems for implementing same, correlate an encoded data word (X0–XM−) 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 ...


6
Gregory S Rawlins, Kevin Brown, Michael W Rawlins, David F Sorrells: Method and apparatus for reducing DC offsets in a communication system. ParkerVision, Sterne Kessler Goldstein & Fox PLLC, July 4, 2006: US07072427 (89 worldwide citation)

Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a c ...


7
David F Sorrells, Gregory S Rawlins, Michael W Rawlins: Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning. ParkerVision, Sterne Kessler Goldstein & Fox P L L C, April 8, 2008: US07355470 (89 worldwide citation)

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 contro ...


8
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins, Francis J Smith: Frequency synthesizer using universal frequency translation technology. ParkerVision, Sterne Kessler Goldstein & Fox P L L C, February 17, 2004: US06694128 (89 worldwide citation)

Frequency translation and applications of same are described herein, including frequency synthesizers that employ universal frequency translation technology. The universal frequency translation technology includes a device for switching, a device for storing, and an energy transfer signal for contro ...


9
David F Sorrells, Michael J Bultman, Robert W Cook, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins: Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments. ParkerVision, Sterne Kessler Goldstein & Fox PLLC, February 8, 2005: US06853690 (86 worldwide citation)

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-har ...


10
David F Sorrells, Michael J Bultman, Robert W Cook, Jonathan S Jensen, Martin R Johnson, Richard C Looke, Charley D Moses Jr, Gregory S Rawlins, Michael W Rawlins, Robert T Short, Jamison L Young: DC offset, re-radiation, and I/Q solutions using universal frequency translation technology. ParkerVision, Sterne Kessler Goldstein and Fox P L L C, April 12, 2005: US06879817 (83 worldwide citation)

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 h ...