Paper Info
Title
Ultrasonic array imaging using CDMA techniques
Abstract
A new method for designing ultrasonic imaging systems is presented in this paper. The method is based on the use of transducer arrays whose elements transmit wideband signals generated by pseudo-random codes, similarly to code division multiple access (CDMA) systems in communications. The use of code sequences instead of pulses, which are typically used in conventional phased arrays, combined with transmit and receive beamforming for steering different codes at each direction, permits parallel acquisition of a large number of measurements corresponding to different directions. Significantly higher image acquisition rate as well as lateral and contrast resolution are thus obtained, while axial resolution remains close to that of phased arrays operating in pulse-echo mode. Time and frequency division techniques are also studied and a unified theoretical model is derived, which is validated by experimental results.
Year
Venue
Keywords
1998
EUSIPCO
array signal processing,code division multiple access,frequency division multiple access,time division multiple access,ultrasonic imaging,ultrasonic transducer arrays,cdma systems,axial resolution,code division multiple access systems,code sequences,contrast resolution,frequency division techniques,image acquisition rate,lateral resolution,parallel acquisition,phased arrays,pseudorandom codes,pulse-echo mode,receive beamforming,time division techniques,transducer arrays,transmit beamforming,ultrasonic imaging systems,wideband signals,correlation,interference,image reconstruction,transducers
Field
DocType
ISBN
Transducer,Beamforming,Wideband,Ultrasonic sensor,Telecommunications,Contrast resolution,Computer science,Sensor array,Image processing,Electronic engineering,Code division multiple access
Conference
978-960-7620-06-4
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Avrithis, Y.S.100.34
Delopoulos, A.N.200.34
Papageorgiou, G.C.300.34