Perception SoC Based on an Ultrasonic Array of Sensors: Efficient DSP Core Implementation and Subsequent Experimental Re
- PDF / 1,512,243 Bytes
- 11 Pages / 600 x 792 pts Page_size
- 28 Downloads / 152 Views
Perception SoC Based on an Ultrasonic Array of Sensors: Efficient DSP Core Implementation and Subsequent Experimental Results A. Kassem ´ PolySTIM Neurotechnology Laboratory, Department of Electrical Engineering, Ecole Polytechnique de Montr´eal, Case Postale 6079, Succursale Centre-ville, Montr´eal, QC, Canada H3C 3A7 Email: [email protected]
M. Sawan ´ PolySTIM Neurotechnology Laboratory, Department of Electrical Engineering, Ecole Polytechnique de Montr´eal, Case Postale 6079, Succursale Centre-ville, Montr´eal, QC, Canada H3C 3A7 Email: [email protected]
M. Boukadoum Department of Computer Sciences, Universit´e du Qu´ebec a` Montr´eal, Case Postale 8888, Succursale Centre-ville, Montr´eal, QC, Canada H3C 3P8 Email: [email protected]
A. Haidar Department of Computer Engineering and Informatics, Beirut Arab University, P.O. Box 11-5020, Beirut 1107 2809, Lebanon Email: [email protected] Received 10 October 2004 We are concerned with the design, implementation, and validation of a perception SoC based on an ultrasonic array of sensors. The proposed SoC is dedicated to ultrasonic echography applications. A rapid prototyping platform is used to implement and validate the new architecture of the digital signal processing (DSP) core. The proposed DSP core efficiently integrates all of the necessary ultrasonic B-mode processing modules. It includes digital beamforming, quadrature demodulation of RF signals, digital filtering, and envelope detection of the received signals. This system handles 128 scan lines and 6400 samples per scan line with a 90◦ angle of view span. The design uses a minimum size lookup memory to store the initial scan information. Rapid prototyping using an ARM/FPGA combination is used to validate the operation of the described system. This system offers significant advantages of portability and a rapid time to market. Keywords and phrases: perception SoC, ultrasonic, focusing, beamforming, DSP, FPGA circuit techniques.
1.
INTRODUCTION
Ultrasound imaging is an efficient, noninvasive, method for medical diagnosis. Employed ultrasound waves allow to obtain information about the structure and nature of tissues and organs of the body [1]. They are generated by converting a radio frequency (RF) electrical signal into mechanical vibration via a piezoelectric transducer sensor. The frequencies of these ultrasound acoustic waves are located above the 20 kHz sensitivity limit of the human ear. Among the applications of ultrasound imaging, it is extensively used in obstetrics to estimate the size and weight of a baby by measuring the head diameter, the abdominal circumference, and the fe-
mur length of the fetus. It is also used to visualize the heart, and measure the blood flows in arteries and veins [2]. The ultrasonic diagnostic imaging systems are mostly operated in the pulse-echo mode. The transducer is used both for transmitting an ultrasonic pulse into the objects and receiving the return echoes from those objects. The pulse-echo systems can be classified as A, B, or M modes. The fi
Data Loading...
