Automatic Word-Length Determination Tool Based on Simulated Annealing Algorithm

An automatic word-length determination tool(SATRANS) based on the simulated annealing algorithm was developed.SATRANS can automatically transform the system from floating-point model to fixed-point model and provide a series of word-length solutions that form a tradeoff curve for hardware complexity vs.signal quality.SATRANS was demonstrated to find word-length for an infinite impulse response filter(IIR).The results show that SATRANS can provide better word-length solution in comparison to the traditional search method based on greedy strategy.The word-length optimized IIR targeting Xilinx Virtex-6 FPGA device was implemented,which improves the performance by 12.4% and 62.8% while saves almost 93.9% and 97.9% of area in comparison to the IEEE single and double floating-point generators.