Harper J Whitehouse

US Patent:

6466515, Oct 15, 2002

Filed:

Oct 26, 2001

Appl. No.:

10/014126

Inventors:

James M. Alsup - San Diego CA
Harper J. Whitehouse - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 1504

US Classification:

367101, 367 99

Abstract:

A sonar system that includes a new comb-like waveform constructed by modulating the tines of a comb spectrum according to a set of Hermite functions defining a Hermite Function Space (HFS), and a processing method that reduces the sidelobes of the ambiguity function associated with the normally-processed HFS comb waveform. Noise-limited performance remains high, because the waveform is designed to be power-efficient; range ambiguity is superior to the highly-rated sinusoidal frequency-modulation (SFM) waveform; and reverberation-limited performance is equal to or better than that offered by any other waveform designed for this purpose. The full Doppler sensitivity normally associated with pulsed CW can be realized by the application to HFS signals of the constrained, regularized deconvolution method of this invention. The deconvolutionally-processed Hermite-function comb waveform offers better reverberation-limited performance than does the triplet-pair comb waveform or any of its predecessors, while maintaining a noise-limited performance equal to the best of these.

US Patent:

7463158, Dec 9, 2008

Filed:

Oct 19, 2005

Appl. No.:

11/253364

Inventors:

Robert K. Hatch - San Diego CA, US
William D. Squire - San Diego CA, US
Harper J. Whitehouse - San Diego CA, US

Assignee:

Linear Measurements, Inc. - San Diego CA

International Classification:

G08B 21/00

US Classification:

340627, 73 5301, 7386118, 7386121, 702128, 702129

Abstract:

The present invention provides an acoustic particle alarm comprising a particle sensor for indicating the concentration of particles exceeding a specified size and specified concentration, for particles entrained in a fluid flow impinging on a front face of the sensor, and a nozzle for directing the fluid flow such that the particles impact the sensor in a direction substantially normal to the front face of the sensor. Each particle impacting the front face of the sensor causes a response in an output of the sensor with amplitude that is monotonic in the momentum of the impinging particle.

US Patent:

47681560, Aug 30, 1988

Filed:

May 6, 1986

Appl. No.:

6/861490

Inventors:

Harper J. Whitehouse - San Diego CA
Donald L. Snyder - St. Louis MO

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G06F 15336
G06F 1566

US Classification:

364521

Abstract:

An improved imaging system has applications to synthetic aperture radar, inverse synthetic aperture radar, delay-doppler radar, positron-emission topography sonar, radiometry and other applications having a target image provided by a series of data parameterized by a variable such as. theta. A receiver structure includes a bandpass matched-filter, square law envelope-detector, specialized processing and convolving to produce the improved images irrespective that the radar signals have practical side lobe structures and other features. Despite the demands of specialized processing the architecture of the algorithm permits real-time implementations.

US Patent:

40103609, Mar 1, 1977

Filed:

Mar 31, 1976

Appl. No.:

5/672107

Inventors:

James M. Alsup - San Diego CA
Harper J. Whitehouse - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G06F 1534
G06G 712

US Classification:

235193

Abstract:

A carrier-compatible device for computing the discrete Fourier transform of an input signal, using the chirp-Z transform (CZT) algorithm, comprising means for connecting to a real and imaginary part of an input signal g. sub. k. A pulse generator generates a sequence of very short pulses. A surface acoustic wave (SAW) chirp generator, whose input is connected to the output of the pulse generator, generates cosine chirp signals and sine chirp signals. Four input mixers have as their two inputs a real or imaginary part of the signal g. sub. k and a sine or cosine chirp signal from the SAW chirp generator. First and second summers have as their two inputs the outputs from two of the input mixers. A SAW chirp filter, whose two inputs are the outputs of the summers, filters out the higher components from the input signal and passes the lower components. Third and fourth summers are connected to the SAW chirp filter, whose two inputs are components from the SAW chirp filter.

US Patent:

40017737, Jan 4, 1977

Filed:

Jul 28, 1975

Appl. No.:

5/599836

Inventors:

Arthur E. Lamel - Arcadia CA
William D. Squire - San Diego CA
Harper J. Whitehouse - San Diego CA

Assignee:

American Petroscience Corporation - Bakersfield CA

International Classification:

G01V 102
G01V 140

US Classification:

340 18LD

Abstract:

An acoustic communication method and system are disclosed for transmitting information through a well-bore drill string by using the acoustic noise inherently generated in the drill string by drilling operations as a "carrier" propagated therealong to be modulated by the information to be transmitted. In the drilling of wells, the action of the drill tool on the bottom of the bore hole creates acoustic noise within the drill string. Other suitable sources of "noise" are often present during "drilling operations", as broadly defined, even while bore drilling, as such, is suspended. This noise usually consists both of wide-band continuous acoustic energy and of narrow spectral lines of acoustic energy and is usually present in a variety of acoustic modes such as longitudinal and torsional acoustic waves. The detailed characteristic of this acoustic noise depends on the type of drill tool used, the drilling speed and the type of formation being drilled. When this inherently generated noise is modulated by an information containing signal at a signal-transmitting station, acoustic communication of information is possible while drilling is in progress, or, in some cases, while drilling as such is suspended.

US Patent:

40991482, Jul 4, 1978

Filed:

May 2, 1977

Appl. No.:

5/793218

Inventors:

James M. Alsup - San Diego CA
Harper J. Whitehouse - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H03H 904
H03H 926
H03H 930
H01L 4110

US Classification:

333 70T

Abstract:

A frequency synthesizer, for use with a means for generating two sequences of electrical pulses, one sequence having a delay with respect to the other, comprises a surface acoustic wave (SAW) device, adapted to receive one of the sequences of electrical pulses from the generating means. The SAW device comprises a substrate, on the surface of which is disposed a first set of interdigitated electrodes. The electrodes receive the electrical pulses and tranduce them to acoustic waves, which traverse the surface of the substrate. The lengths of the electrodes are configured as a function of m, where m is defined by the relation m = R. sup. n mod P, where P is a prime number, R is a primitive root of P, and 1. ltoreq. n. ltoreq. P-1. A second set of interdigitated electrodes, approximately N-1 in number, is also disposed on the surface of the substrate, the electrodes of the first and second sets being parallel. The second set of electrodes is so disposed as to receive the acoustic waves generated by the first set of electrodes, and transduce them back to electrical signals, which are conducted on a set of leads connected to the electrodes.

US Patent:

39521869, Apr 20, 1976

Filed:

Feb 10, 1975

Appl. No.:

5/548300

Inventors:

Jeffrey M. Speiser - San Diego CA
Harper John Whitehouse - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G06F 1534

US Classification:

235156

Abstract:

An apparatus for the generation of a two-dimensional discrete Fourier transform of an input signal developed from data within a data block, or field, having a size of N. sub. 1 by N. sub. 2 data points, N. sub. 1 and N. sub. 2 being relatively prime with respect to each other, the transforms being in a form suitable for subsequent electronic processing. The apparatus comprises an input scan apparatus connectable to the N. sub. 1 by N. sub. 2 two-dimensional data field comprising the input signal, such as a television viewing field. The apparatus receives and scans in proper order, or sequence, the N. sub. 1 by N. sub. 2 input data so that the subsequently generated one-dimensional Fourier transform of the length N. sub. 1 N. sub. 2 serial data string is identical to an N. sub. 1 by N. sub. 2 two-dimensional discrete Fourier transform of the N. sub. 1 by N. sub.

US Patent:

47927879, Dec 20, 1988

Filed:

Feb 4, 1987

Appl. No.:

7/010675

Inventors:

Jeffrey M. Speiser - San Diego CA
Harper J. Whitehouse - San Diego CA
William H. McKnight - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H03M 304

US Classification:

341156

Abstract:

Improved dynamic range resolution or accuracy analog to digital conversion ses linear prediction. An open loop or feed-forward architecture passes an analog signal to a coarse or orthodox analog-to-digital converter that provides digital signals representing a most significant part of the output signal and offers them as inputs to a digital linear predictor whose digital output signal is reconverted to analog form and fed to an analog adder. An analog delay device may be used to receive the next analog sample and, after the proper delay (if needed), feed it to the adder where the difference between the analog predicted value and the analog signal is determined and passed to a subsequent coarse or orthodox analog to digital converter. A closed loop or feedback configuration receives the analog input signal data as well as a feedback predicted value in analog form and passes the difference to a coarse or orthodox analog to digital converter. A digital delay of the digital signal may be used to insure that the digital summing of prediction and digitized error signals occurs at the appropriate times.