—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.
—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
Ruobo Lin, Guixiong Liu, and Wenming Tang are with School of
Mechanical & Automotive Engineering, South China University of
Technology, Guangzhou, China
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.