Jerry W Holmes

Author:

Jerry Holmes

ISBN #:

0742521168

US Patent:

61413712, Oct 31, 2000

Filed:

Dec 4, 1997

Appl. No.:

8/985345

Inventors:

Jerry D. Holmes - Plano TX
Kenneth S. Barron - Plano TX
Anthony Reid - Plano TX

Assignee:

Raytheon Company - Lexington MA

International Classification:

H04B 1500

US Classification:

375130

Abstract:

A jamming suppression system which includes a plurality of receivers for receiving electromagnetic radiations and a separate notch filter coupled to each receiver for filtering selected frequencies from electromagnetic radiations received by each of the receivers. In accordance with one embodiment of the invention, a spatial combiner responsive to the outputs of each of the notch filters extracts essentially jam-free information from the electromagnetic radiations. In accordance with a second embodiment of the invention, a plurality of spatial combiners, each responsive to the outputs of each of the notch filters, extracts essentially jam-free information from the electromagnetic radiations. The notch filters are adaptive notch filters for on-line selection of their filtering action. One of the notch filters is a master filter and the remainder of the notch filters are slave filters controlled by the master filter.

US Patent:

59866055, Nov 16, 1999

Filed:

Apr 6, 1998

Appl. No.:

9/056070

Inventors:

Leslie A. Priebe - Plano TX
Jerry D. Holmes - Plano TX

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 502

US Classification:

342427

Abstract:

A system and method for estimating azimuth angle, elevation angle and signal detection and which includes an antenna system having a plurality of elements, each element receiving a different concurrent portion of an incoming analog signal having a real and an imaginary portion. A converter is provided for each antenna element for converting each analog signal to digital form. A processor is provide for multiplying the sum of the real parts of the signals from a first group of the elements with the conjugate of the sum of the remainder of the elements to provided an estimated azimuth, elevation of signal detection measurement. In the case of a four element antenna, AzEst=Angle((A+B)*(C+D)Conjugate))=(x. sub. A +iy. sub. A +x. sub. B +iy. sub. B)*(x. sub. C -iy. sub. C +x. sub. D -iy. sub. D), ElEst=Angle((A+D)*(B+C)Conjugate))=(x. sub. A +iy. sub. A +x. sub. D +iy. sub. D)*(x. sub. B -iy. sub. B +x. sub. C -iy. sub. C) and Magnitude ((A+B*(C+D)Conjugate)) or Magnitude ((A+D*(B+C)Conjugate)).

US Patent:

58183710, Oct 6, 1998

Filed:

Dec 12, 1996

Appl. No.:

8/764828

Inventors:

Chyi Haw Lu - Plano TX
Jerry D. Holmes - Plano TX
Hugh L. Scott - Breckenridge CO

Assignee:

Raytheon TI Systems Inc. - Lewisville TX

International Classification:

G01S 1300

US Classification:

341122

Abstract:

A method and system for synchronization of pulse groups without a synchronization signal which comprises selecting a plurality of equal time length coherent processing intervals from a stream of data in the time domain, generally analog data. The data in each of the coherent processing intervals is sampled during each of N equal pulse repetition intervals to provide samples of data, each sampling taking place for an equal portion of the pulse repetition interval. Each of the samples of data is identified according to the position thereof in the associated coherent processing interval. The time domain data is converted to frequency domain data on the basis of the position of the time domain data in the coherent processing interval, all of the samples with the same position in a different coherent processing interval being separately collectively converted. The frequency domain data is then compensated for phase rotation by determining the length of the coherent processing interval, the length of the pulse repetition interval and the duration of the sampling and altering the phase of the frequency domain data in response thereto. An FFT is provided of selected ones of the frequency domain data.

US Patent:

39493245, Apr 6, 1976

Filed:

Nov 11, 1974

Appl. No.:

5/522554

Inventors:

Benjamin L. Lowe - Huntsville AL
Jerry D. Holmes - Dallas TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03C 328

US Classification:

332 26

Abstract:

A system for generating angular modulation comprising a balanced modulator and an adding circuit to which a surface wave device quadrature oscillator applies two signals at the carrier frequency differing 90. degree. in phase, such phase difference being accurately maintained independent of aging and variations in operating temperatures. More particularly, an information signal is applied to one input of the balanced modulator, the output of which is applied to the adding circuit. The surface wave device oscillator completes the system by applying an in-phase carrier frequency to a second input of the balanced modulator and a carrier frequency shifted 90. degree. in phase to a second input of the adding circuit. Angular modulation is thus produced at the output of the adding circuit.

US Patent:

48072567, Feb 21, 1989

Filed:

Dec 23, 1985

Appl. No.:

6/811984

Inventors:

Jerry D. Holmes - Dallas TX
Hatcher E. Chalkley - Carrollton TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04L 2706

US Classification:

375 97

Abstract:

A Global Position System (GPS) receiver is disclosed which includes an RF converter and quadrature digitizer implemented in hardware and a signal processor including a computer, code generator and preprocessor. The preprocessor has a divide by 1,2,3 divider for controlling the code generator so as to provide I,Q early, prompt and late digital signals of 0. 5 chip separations to the computer for tracking code phase, carrier phase/frequency and signal amplitude. This structure eliminates the need for numerically controlled oscillators implemented in hardware while maintaining accurate performance.

US Patent:

51856107, Feb 9, 1993

Filed:

Aug 20, 1990

Appl. No.:

7/569890

Inventors:

Phillip W. Ward - Dallas TX
H. Logan Scott - The Colony TX
Jerry D. Holmes - Colorado Springs CO
Leonard J. LaPadula - Carrollton TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04B 7185
G01S 502

US Classification:

342357

Abstract:

A GPS single-receiver pointing/attitude system derives pointing/attitude measurements by correlating a selected GPS code (either P or C/A), recovered from GPS navigation signals using a single GPS receiver with multiple GPS antennas (a reference antenna and at least two slave antennas for pointing or three for attitude). For a two antenna pointing application, the GPS receiver (FIG. 4) includes, for each receiver channel, the incoming GPS signals are applied to three code correlators (72-75) assigned to the reference antenna, and three code correlators (76-77) assigned to the slave antenna, which provide corresponding reference and slave I and Q correlation outputs. The single-receiver pointing technique involves: (a) using the reference I and Q correlation outputs to establish a conventional reference antenna tracking loop; and (b) processing the reference and slave I and Q correlation outputs (using differential carrier doppler phase or code phase measurements) to determine phase differences from which pointing can be computed.

US Patent:

39367517, Feb 3, 1976

Filed:

Sep 5, 1974

Appl. No.:

5/503943

Inventors:

Jerry D. Holmes - Dallas TX
Benjamin L. Lowe - Huntsville AL
Samuel D. Moore - Plano TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04B 116

US Classification:

325347

Abstract:

An SWD structure is employed in an FM receiver for signal demodulation and band limiting. An FM signal is applied to the input of an SWD patterned for bandwidth limitation. Two SWD output channels characterized by predetermined differential delays of the modulated input signal are amplitude limited and mixed to produce an audio modulation component.

US Patent:

41123727, Sep 5, 1978

Filed:

Jan 11, 1977

Appl. No.:

5/758520

Inventors:

Jerry D. Holmes - Dallas TX
Charles R. Johnson - Garland TX
Allen S. Jones - Dallas TX
Charles R. Hewes - Richardson TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H04L 100

US Classification:

325321

Abstract:

An improved spread spectrum communication system having a transmitter subsystem and a receiver subsystem is disclosed. The transmitter subsystem comprises a data source of 50 bps rate which is modulo-2 added to a C/A (clear/acquisition) code of 1,023K chips/sec in an EXCLUSIVE OR gate, phase modulated on a carrier signal at about 154 f. sub. o where f. sub. o = 10. 23 MHz in a phase shift keying modulator and transmitted. The receiver subsystem comprises an antenna for receiving the phase modulated signal, a plurality of filter/amplifier mixer stages for reducing the phase modulated signal to baseband, an in-phase CCD matched filter channel and a quadrature phase CCD matched filter channel for determining the presence of the C/A code and the phase of the incoming C/A code for synchronizing a replica of the C/A code with the incoming C/A code, a mixer for beating the replica C/A code signal with the C/A code signal, a Costas loop for automatic phase control, a sampler for sampling the baseband signal, an integrator for integrating the sampled signals, and a clocked comparator for comparing the integrated signals with a zero voltage at a 50Hz rate to demodulate the data code. Two embodiments of the CCD matched filter are disclosed. The first comprises a CCD having a length equal to five times the number of stages for each period of the C/A code.