SoC-Based Architecture for an Ultrasonic Phased Array With Encoded Transmissions

被引:1
作者
Carmen Perez, Maria [1 ]
Garcia, Rodrigo [1 ]
Hernandez, Alvaro [1 ]
Jimenez, Ana [1 ]
Diego, Cristina [1 ]
Urena, Jesus [1 ]
机构
[1] Univ Alcala de Henares, Dept Elect, E-28806 Alcala De Henares, Madrid, Spain
关键词
Code-division multiple access (CDMA); field-programmable gate arrays (FPGA); System-on-Chip (SoC); ultrasonic phased array; SYSTEM; EXCITATION;
D O I
10.1109/TCSI.2014.2377790
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This work presents a SOC-based (system-on-chip) architecture for ultrasonic imaging systems in airborne transmission which uses macro-sequences derived from complementary sets of sequences (CSS) to achieve simultaneous beam steering in several directions. By means of CSS concatenation and zero padding, a new macro-sequence can be obtained which achieves zero auto-and cross-correlation zones (ZCZ). These zones can be adjusted to provide interference-free CDMA (code division multiple access) within the scanning area. The correlation results with the proposed macro-sequences provide the A-scan lines for a final B-scan image. In contrast to other encoding schemes with similar sizes of ZCZ, the one proposed here allows an architecture design that further minimizes the computational load to make real-time processing feasible. The implementation of the proposed architecture in a FPGA (field-programmable gate array) device, including all the stages from the emission and reception modules of the imaging ultrasonic system, is presented. The ultrasonic phased array has 8 elements and permits the simultaneous analysis of 32 different angular sectors, for a maximum range of 1.5 m and an angular aperture of +/- 64 degrees.
引用
收藏
页码:873 / 880
页数:8
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