Accelerated Performance Evaluation of Fixed-Point Systems With Un-Smooth Operations

作者：Parashar Karthick Nagaraj^*; Menard Daniel; Sentieys Olivier

来源：IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2014, 33(4): 599-612.

DOI：10.1109/TCAD.2013.2292510

• Accuracy estimation
• fixed-point refinement
• perturbation theory
• quantization noise
• signal processing

The problem of accuracy evaluation is one of the most time consuming tasks during the fixed-point refinement process. Analytical techniques based on perturbation theory have been proposed in order to overcome the need for long fixed-point simulation. However, these techniques are not applicable in the presence of certain operations classified as un-smooth operations. In such circumstances, fixed-point simulation should be used. In this paper, an algorithm detailing the hybrid technique which makes use of an analytical accuracy evaluation technique used to accelerate fixed-point simulation is presented. This technique is applicable to signal processing systems with both feed-forward and feedback interconnect topology between its operations. The acceleration obtained as a result of applications of the proposed technique is consistent with fixed-point simulation, while reducing the time taken for fixed-point simulation by several orders of magnitude.

• 出版日期2014-4