Bill Jo Hunsinger

6563880, May 13, 2003

Apr 22, 1999

09/298093

Bill J. Hunsinger - Urbana IL
Derek D. Kumar - Champaigne IL

Ibiquity Digital Corporation - Columbia MD

H04H 500

375260, 375271, 375302, 375324, 375340, 455102

A system and method for transmitting digital information through a medium such as atmospheric free-space includes a transmitter which generates a signal based on a basis set of mutually orthogonal, spectrally-shaped, sequences of substantially equal length and having predetermined autocorrelation values. The sequences may resemble noise in at least some of their characteristics. The orthogonality or cross-correlation characteristics, the autocorrelation characteristics and the resemblance to noise are due to features derived from sequences of pseudo-random numbers which themselves resemble noise in at least some of their characteristics. The waveform set based on the sequences is modulated digitally. The modulated set may be summed together along with a wideband reference signal of reduced amplitude and optionally an FM analog signal to form a composite signal which is broadcast typically through free space to at least one receiver. The receiver separates the analog FM signal from the digital signal and thereafter demodulates the digital data-carrying waveforms and outputs a stream of digital data.

41433408, Mar 6, 1979

Sep 1, 1976

5/719552

Bill J. Hunsinger - Mahomet IL

The Magnavox Company - Fort Wayne IN

H03H 904
H03H 926
H03H 930
H01L 4110

333151

An acoustic surface wave device having a substrate of a material capable of propagating acoustic surface wave energy. At least one electro-acoustic transducer coupled to a region of a surface of the substrate. The transducer has a first and a second bus bar positioned parallel and a distance from each other. A plurality of electrodes extend from each bus bar. The electrodes from the first bus bar are opposite to the electrodes of the second bus bar with the electrodes from one of the bus bars being forked and surrounding the electrode located in an opposite relationship thereto, thus, reducing substantially any synchronous reflections.

59498137, Sep 7, 1999

Aug 19, 1997

8/914356

Bill J. Hunsinger - Urbana IL
Derek D. Kumar - Champaign IL

USA Digital Radio Partners, LP - Columbia MD

H04B 1500

375200

A system and method for transmitting digital information through a medium such as atmospheric free-space includes a transmitter which generates a signal based on a basis set of mutually orthogonal, spectrally-shaped, sequences of substantially equal length and having predetermined autocorrelation values. The sequences may resemble noise in at least some of their characteristics. The orthogonality or cross-correlation characteristics, the autocorrelation characteristics and the resemblance to noise are due to features derived from sequences of pseudo-random numbers which themselves resemble noise in at least some of their characteristics. The waveform set based on the sequences is modulated digitally. The modulated set may be summed together along with a wideband reference signal of reduced amplitude and optionally an FM analog signal to form a composite signal which is broadcast typically through free space to at least one receiver. The receiver separates the analog FM signal from the digital signal and thereafter demodulates the digital data-carrying waveforms and outputs a stream of digital data.

41624661, Jul 24, 1979

Sep 28, 1977

5/837569

Bill J. Hunsinger - Mahomet IL
Roger D. Fildes - Urbana IL

University of Illinois Foundation - Urbana IL

H03H 902
H03H 926
H03H 932
H03H 904

333194

Applicants have discovered that the performance of Surface Acoustic Wave Resonators can be markedly improved by digressing from the accepted techniques of sensing standing waves set up by resonation in the SAW device. Applicants have developed a SAW resonator which employs one or more unidirectional transducers which are sensitive to traveling rather than standing waves. This construction obviates the deletevious action of direct, broad band, input to output coupling and avoids the high position sensitivity which occurs when bidirectional transducers are utilized to sense standing wave patterns.

40356752, Jul 12, 1977

Apr 8, 1976

5/675134

Donald C. Malocha - Urbana IL
Bill J. Hunsinger - Mahomet IL

University of Illinois Foundation - Urbana IL

H01L 4104
H03H 930

310 98

A transducer for a surface acoustic wave device. In accordance with an embodiment of the invention, there is provided an acoustic wave propagating substrate and first and second spaced elongated conductive fingers disposed on the substrate. A layer of dielectric material is formed over the first and second fingers. A first electrode is formed on the dielectric layer above the first finger, the first electrode being proportioned to oppose a predetermined portion of the first finger. A second electrode is formed on the dielectric layer above the first finger, the second electrode being spaced from the first electrode and proportioned to oppose another predetermined portion of the first finger. A third electrode is formed on the dielectric layer above the second finger, the third electrode being proportioned to oppose a predetermined portion of the second finger. A fourth electrode is formed on the dielectric layer above the second finger, the fourth electrode being proportioned to oppose another predetermined portion of the second finger.

57455252, Apr 28, 1998

Jun 7, 1995

8/485599

Bill J. Hunsinger - Urbana IL
Derek D. Kumar - Champaign IL

USA Digital Radio Partners, L.P. - Linthicum MD

H04B 1500

375285

A system and method for transmitting digital information through a medium such as atmospheric free-space includes a transmitter which generates a signal based on a basis set of mutually orthogonal, spectrally-shaped, sequences of substantially equal length and having predetermined autocorrelation values. The sequences may resemble noise in at least some of their characteristics. The orthogonality or cross-correlation characteristics, the autocorrelation characteristics and the resemblance to noise are due to features derived from sequences of pseudo-random numbers which themselves resemble noise in at least some of their characteristics. The waveform set based on the sequences is modulated digitally. The modulated set may be summed together along with a wideband reference signal of reduced amplitude and optionally an FM analog signal to form a composite signal which is broadcast typically through free space to at least one receiver. The receiver separates the analog FM signal from the digital signal and thereafter demodulates the digital data-carrying waveforms and outputs a stream of digital data.

59566248, Sep 21, 1999

Jul 12, 1994

8/274140

Bill J. Hunsinger - Urbana IL
Derek D. Kumar - Champaigne IL

USA Digital Radio Partners LP - Columbia MD

H04B 726

455 65

Apparatus and method for transmitting a digitized wideband signal robust to multipath degradation and intersymbol interference within a predetermined broadcast band. A basis set of wideband mutually orthogonal pseudorandom basis signal waveforms of substantially equal length and having predetermined autocorrelation values and a predetermined spectral shape are generated. The length of the waveforms in the set represents a baud. The wideband waveforms of the basis set are data modulated so as to define digital data. The basis set substantially maintains the predetermined spectral shape during the modulation.

44172214, Nov 22, 1983

Apr 2, 1982

6/364924

Bill J. Hunsinger - Mahomet IL

Harris Corporation - Melbourne FL

H03H 942
H03H 964
H03H 9145

333194

A surface acoustic wave (SAW) device is disclosed. The SAW device includes input and output transducers disposed in spaced acoustic tracks on a piezoelectric substrate material, and a multi-strip coupler for translating the acoustic beam generated by the input transducer into the acoustic track in which the output transducer is located. The multi-strip coupler is designed so as to minimize the influence of Fresnel peaks found to exist in the amplitude profile of the acoustic beam in the output acoustic track. The multi-strip coupler is longer than in the past, and includes a central fanned region for providing well defined acoustic boundaries whose locations do not vary from device to device.