Computation Error Analysis in Digital Signal Processing Systems With Overscaled Supply Voltage

It has been recently demonstrated that digital signal processing systems may possibly leverage unconventional voltage overscaling (VOS) to reduce energy consumption while maintaining satisfactory signal processing performance. Due to the computation-intensive nature of most signal processing algorithms, the energy saving potential largely depends on the behavior of computer arithmetic units in response to overscaled supply voltage. This paper shows that different hardware implementations of the same computer arithmetic function may respond to VOS very differently and result in different energy saving potentials. Therefore, the selection of appropriate computer arithmetic architecture is an important issue in voltage-overscaled signal processing system design. This paper presents an analytical method to estimate the statistics of computer arithmetic computation errors due to supply voltage overscaling. Compared with computation-intensive circuit simulations, this analytical approach can...

• Type: Journal
• Year: 2010
• Where: TVLSI
• Authors: Yang Liu, Tong Zhang, Keshab K. Parhi
• Keywords: Arithmetic, Artificial Intelligence, Signal Processing, Signal Processing Systems, TVLSI 2010