Title :
Design of high-precision FFT based on VHDL and analysis of code coverage
Author_Institution :
Coll. of Phys. & Inf. Sci., Hunan Normal Univ., Changsha, China
Abstract :
This paper uses structured design to implement the floating-FFT by VHDL with ISE5.3 and simulates it by ModelSim. The data pathways in this project are in the form of 32-bit single precision format which can avoid data overflow and achieve high SNR. In this project, the Radix-2 algorithm is used and the controller is modeled as a finite state machine. The simulation and code coverage analysis results show that (1) the design can achieve high accuracy; (2) the running speed is fast enough to meet the real-time signal processing requirements, and (3) the test work is very complete.
Keywords :
digital arithmetic; fast Fourier transforms; finite state machines; hardware description languages; real-time systems; signal processing; 32-bit single precision format; ISE5.3; ModelSim; Radix-2 algorithm; VHDL; code coverage analysis; data overflow; data pathway; finite state machine; floating FFT; high accuracy design; high precision FFT; real-time signal processing requirement; structured design; Analytical models; Clocks; Data models; Process control; Random access memory; Signal processing algorithms; Simulation; VHDL; code coverage; floating FFT; high precision;
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-61284-087-1
DOI :
10.1109/EMEIT.2011.6023838
