|Title||Fast and Energy-Efficient Digital Filters for Signal Conditioning in Low-Power Microcontrollers|
|Publication Type||Conference Paper|
|Year of Publication||2017|
|Authors||Moreno, C., and S. Fischmeister|
|Conference Name||Design Automation Conference (DAC)|
|Conference Location||Austin, USA|
Embedded systems often use digital filtering after analogto-digital conversion when signal conditioning is required. However, digital filters are computationally demanding, making them unsuitable for low-power microcontrollers.
In this paper, we propose a fast and energy-efficient digital filtering technique based on look-up tables. The novelty in our technique is the use of multiple small LUTs, with a novel way to combine them to reduce the quantization error. As an additional novelty element, we propose a new inputcentric efficient implementation, specific to LUT-based software filters. Experimental results confirm the technique's remarkable potential for speed as well as its energy efficiency.