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1. WO2000041162 - METHOD AND APPARATUS FOR DISTRIBUTED, AGILE CALCULATION OF BEAMFORMING TIME DELAYS AND APODIZATION VALUES

Publication Number WO/2000/041162
Publication Date 13.07.2000
International Application No. PCT/US1999/028652
International Filing Date 06.12.1999
IPC
G01S 7/52 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/, G01S15/, G01S17/127
52of systems according to group G01S15/58
G01S 15/89 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
88Sonar systems specially adapted for specific applications
89for mapping or imaging
G06F 7/544 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
7Methods or arrangements for processing data by operating upon the order or content of the data handled
38Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
48using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
544for evaluating functions by calculation
G06F 7/552 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
7Methods or arrangements for processing data by operating upon the order or content of the data handled
38Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
48using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
544for evaluating functions by calculation
552Powers or roots
G10K 11/34 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
18Methods or devices for transmitting, conducting or directing sound
26Sound-focusing or directing, e.g. scanning
34using electrical steering of transducer arrays, e.g. beam steering
CPC
G01S 15/8993
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
88Sonar systems specially adapted for specific applications
89for mapping or imaging
8906Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
8993Three dimensional imaging systems
G01S 7/52046
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
52of systems according to group G01S15/00
52017particularly adapted to short-range imaging
52046Techniques for image enhancement involving transmitter or receiver
G06F 7/5446
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
7Methods or arrangements for processing data by operating upon the order or content of the data handled
38Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
48using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
544for evaluating functions by calculation
5446using crossaddition algorithms, e.g. CORDIC
G06F 7/552
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
7Methods or arrangements for processing data by operating upon the order or content of the data handled
38Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
48using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
544for evaluating functions by calculation
552Powers or roots ; , e.g. Pythagorean sums
G10K 11/346
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES
11Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
18Methods or devices for transmitting, conducting, or directing sound
26Sound-focusing or directing, e.g. scanning
34using electrical steering of transducer arrays, e.g. beam steering
341Circuits therefor
346using phase variation
Applicants
  • GENERAL ELECTRIC COMPANY [US/US]; 1 River Road Schenectady, NY 12345, US
Inventors
  • MILLER, Steven, C.; US
Agents
  • STECKLER, Henry, I. ; General Electric Company 3135 Easton Turnpike W3C Fairfield, CT 06431, US
Priority Data
09/223,95031.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR DISTRIBUTED, AGILE CALCULATION OF BEAMFORMING TIME DELAYS AND APODIZATION VALUES
(FR) PROCEDE ET DISPOSITIF DE CALCUL AGILE REPARTI POUR DES RETARDS DANS LA FORMATION DE RAYONS ET VALEURS D'APODISATION
Abstract
(EN)
An architecture in which a plurality of delay calculators (28) are distributed throughout the beamformer. Each delay calculator (28) provides beamforming delays and apodization values for a plurality of channels (32)/elements (34). The delay calculators (28) are initialized with element position coordinates. Then, while imaging, focal coordinates and steering angles are broadcast to all delay calculators (28). The delay calculator (28) uses a cordic rotator to perform the aperture projections and calculate the hypotenuse. The cordic rotator performs successive coordinate transformations, in two dimensions, using coefficients that are simple powers of two. The resulting apodization values and time delays are then provided by a channel control bus (30) to a plurality of channels (32).
(FR)
Cette invention concerne une architecture dans laquelle une pluralité de calculateurs de retards (28) sont répartis dans le formeur de faisceaux. Chacun des calculateurs de retard (28) fournit des retards relatifs à la formation de faisceaux et des valeurs d'apodisation pour une pluralité de canaux (32)/éléments (34). Les calculateurs de retard (28) sont initialisés au moyen de coordonnées de position d'éléments. Ensuite, pendant la formation d'images, les coordonnées focales et les angles de direction sont transmis à tous les calculateurs de retard (28). Ces calculateurs font intervenir un rotateur « cordique » pour exécuter des projections d'ouverture et calculer l'hypoténuse. Le rotateur de corde exécute des transformations de coordonnées successives, en deux dimensions, au moyen de coefficients qui sont de simples puissances de deux. Les valeurs d'apodisation et les valeurs de retard sont alors transmises à une pluralité ce canaux (32) via un bus de commande de canal (30).
Also published as
Latest bibliographic data on file with the International Bureau