Robert R Pierce

US Patent:

6643337, Nov 4, 2003

Filed:

Jun 2, 2000

Appl. No.:

09/587366

Inventors:

Robert D. Pierce - Sterling VA

Assignee:

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

International Classification:

H04L 1318

US Classification:

375343, 342189, 342378, 708422

Abstract:

A complex signal correlator such as can be implemented in a correlation detector system affords a unique algorithm which estimates the codifference correlation between two complex signals based on the sum and difference of codifference estimates, each codifference estimate having equivalently associated therewith a dispersion estimate. Typical embodiments provide a receiving antenna and a receiver inclusive of the codifference correlator, wherein radio frequency waves are down converted and sampled, the sampled signals are correlated with a reference signal contained in a memory, and the resultant correlation signal is detected and transduced. The inventive correlator is based on an alpha-stable distribution and, in comparison with conventional alpha-stable distribution-based correlators, can more effectively operate in a realm wherein alpha is less than one.

US Patent:

7424481, Sep 9, 2008

Filed:

Feb 1, 2005

Appl. No.:

11/048949

Inventors:

Robert D. Pierce - Albany CA, US
Michael A. Davis - Scottsdale AZ, US

Assignee:

SAP AG - Walldorf

International Classification:

G06F 17/40

US Classification:

707101, 707 7, 7071041

Abstract:

A computer system performs data processing using a data organizer which parses a primary set of data into predefined sets of data components according to one or more enterprise models. The sets of data components from the data organizer are respectively stored in multiple data sources. The data components may be stored as a binary file or hierarchical file. A plurality of data processing systems execute the enterprise models. A task manager controls which enterprise model executes on each data processing system. The data processing systems access the data components from the data sources which correspond the executing enterprise model. The data components are sent over dedicated communication channels to the data processing systems. Each data processing system may have a data interface, which is configured to receive data from different sources and convert the data into a standard format.

US Patent:

7606684, Oct 20, 2009

Filed:

Dec 8, 2005

Appl. No.:

11/298175

Inventors:

Robert D. Pierce - Albany CA, US

Assignee:

SignalDemand, Inc. - San Francisco CA

International Classification:

G06F 17/50
G06F 3/00

US Classification:

703 2, 703 22, 702189

Abstract:

A model creation tool is provided that automatically evaluates potential econometric models and, given a set of historical data on which the model is intended to operate and other constraints, automatically identifies an optimum model. The optimum model may be an autoregressive model. The optimum model is defined by a set of optimum model parameters and optimum model coefficients. The optimum model parameters may include a model order such as an autoregressive model order, a seasonality function parameter, a trend function parameter, and a parameter that sets a tolerance that is used when performing principal components dimension reduction operations on the historical data.

US Patent:

20080294481, Nov 27, 2008

Filed:

Aug 6, 2008

Appl. No.:

12/186724

Inventors:

Robert D. Pierce - Albany CA, US
Michael A. Davis - Scottsdale AZ, US

Assignee:

SAP AG - Walldorf

International Classification:

G06Q 10/00

US Classification:

705 7

Abstract:

A computer system performs data processing using a data organizer which parses a primary set of data into predefined sets of data components according to one or more enterprise models. The sets of data components from the data organizer are respectively stored in multiple data sources. The data components may be stored as a binary file or hierarchical file. A plurality of data processing systems execute the enterprise models. A task manager controls which enterprise model executes on each data processing system. The data processing systems access the data components from the data sources which correspond the executing enterprise model. The data components are sent over dedicated communication channels to the data processing systems. Each data processing system may have a data interface, which is configured to receive data from different sources and convert the data into a standard format.

US Patent:

54021316, Mar 28, 1995

Filed:

Sep 28, 1993

Appl. No.:

8/127619

Inventors:

Robert D. Pierce - Sterling VA

Assignee:

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

International Classification:

G01S 13526
G01S 7292

US Classification:

342194

Abstract:

A signal detection system, preferably for use with a coherent radar system elects certain combination of input signal samples in a block of signal samples to derive a test statistic which is unbiased by Gaussian noise. Products of pairs of sample values are stored in a data sample look-up table. An index look-up table is created by scanning through possible combinations of addresses and excluding those combinations of sample values which would be redundant over other combination and would result in a contribution to biasing by noise. Pairs of addresses from the index look-up table are then used in sequence to access first and second products from the data sample look-up table. The first product is multiplied by the complex conjugate of the second product and the (quadruple product) result is averaged to form a test statistic which is insensitive to position and constant velocity. Detection of the signal is determined by testing the real part of the averaged test statistic against a threshold. To allow such detection for an accelerating target, a lag index is derived for each combination of addresses in the index look-up table and the accumulation and averaging is done while sorting in accordance with the lag index.

US Patent:

55153003, May 7, 1996

Filed:

Sep 30, 1993

Appl. No.:

8/129500

Inventors:

Robert D. Pierce - Sterling VA

Assignee:

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

International Classification:

G01R 2300
G01R 2316

US Classification:

364572

Abstract:

A signal detection system divides a data sampling run into blocks and perms a fast Fourier transform on each block, sorting results by frequency. Combinations of results of the fast Fourier transform corresponding to each frequency are processed to derive a test statistic which is unbiased by Gaussian noise while including such combinations of results of the fast Fourier transform which would be redundant over other combinations. Information concerning the frequency behavior of the signal derived in the course of detection, is accomplished with increased sensitivity.

US Patent:

52278018, Jul 13, 1993

Filed:

Jun 26, 1992

Appl. No.:

7/904927

Inventors:

Robert D. Pierce - Sterling VA

Assignee:

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

International Classification:

G01S 1389
G01S 7292

US Classification:

342192

Abstract:

A coherent radar is used for achieving high resolution radar imaging of a moving object in sea clutter and noise. A stored replica of the transmitted waveform is combined with the returned signal in a synchronous detector to produce in-phase and quadrature (I and Q or complex) samples. High resolution is achieved by transmitting a series of pulses, each at a different frequency, and then processing these complex samples to produce a synthetic down-range profile. To enhance the radar target or object from system noise and sea clutter, the complex I and Q (in-phase and quadrature component) samples from the radar are coherently averaged in a special two-dimensional slice of the trispectrum (e. g. quadruple product or fourth-order moment). This formulation of the fourth moment retains all important target information and suppresses Gaussian noise.

US Patent:

52314030, Jul 27, 1993

Filed:

Sep 30, 1992

Appl. No.:

7/953622

Inventors:

Robert D. Pierce - Sterling VA

Assignee:

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

International Classification:

G01S 1300

US Classification:

342192

Abstract:

While the computation of high resolution radar images based on higher order tatistics is position insensitive, velocity estimation may be based on the ratios of values of a trispectral slice and a cross-trispectral slice computed as quadruple products of complex valued signals developed by coherent radar. Signal-to-noise ratio is improved by either averaging over a plurality of bursts during computation of both the trispectral slice and the cross-trispectral slice or averaging of values of ratios of trispectral slice and cross-trispectral slice values at particular frequencies or wavenumbers, or both.