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General Information
Editor-in-chief
Prof. T. Hikmet Karakoc
Anadolu University, Faculty of Aeronautics and Astronautics, Turkey

IJET 2015 Vol.7(3): 249-253 ISSN: 1793-8236
DOI: 10.7763/IJET.2015.V7.800

FPGA Implementation of Ultrasonic S-Scan Coordinate Conversion Based on Radix-4 CORDIC Algorithm

Ruobo Lin, Guixiong Liu, and Wenming Tang
Abstract—To solve the existing problems on traditional method of calling function at ultrasonic S-scan coordinate conversion, this paper introduced the FPGA implementation of ultrasonic S-scan coordinate conversion based on Radix-4 CORDIC algorithm. On the analysis of the Radix-4 Rotation CORDIC algorithm, we selected 7-level pipeline structure on FPGA, used the preprocessing technique to solve the non-constant problem of scale factor. The simulation results show that the maximum error of Radix-4 Rotation CORDIC algorithm is 1.5×10-3 and the computing latency is only 7T at 16 bit data-width under 100MHz FPGA. The scan conversion rate speed up at least 10 times, and the output effect of the image is basically the same as the traditional method. The algorithm has the characteristics of low latency, high speed and high precision, suitable for real-time signal processing applications.

Index Terms—Ultrasonic s-scan, coordinate conversion, radix-4 cordic, FPGA, real-time signal processing .

Ruobo Lin is with the Department of Electrical and Mechanical Engineering, Jieyang Vocational and Technical College, Jieyang, China (e-mail: linruobo@126.com)
Ruobo Lin, Guixiong Liu, and Wenming Tang are with School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, China

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Cite: Ruobo Lin, Guixiong Liu, and Wenming Tang, "FPGA Implementation of Ultrasonic S-Scan Coordinate Conversion Based on Radix-4 CORDIC Algorithm," International Journal of Engineering and Technology vol. 7, no. 3, pp. 249-253, 2015.

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