On the design of an energy efficient digital IIR A-weighting filter using approximate multiplication

Pilipović, Ratko (avtor), Risojević, Vladimir (avtor), Bulić, Patricio (avtor)

This paper presents a new A-weighting filter’s design and explores the potential of using approximate multiplication for low-power digital A-weighting filter implementation. It presents a thorough analysis of the effects of approximate multiplication, coefficient quantization, the order of first-order sections in the filter’s cascade, and zero-pole pairings on the frequency response of the digital A-weighting filter. The proposed A-weighting filter was implemented as a sixth-order IIR filter using approximate odd radix-4 multipliers. The proposed filter was synthesized (Verilog to GDS) using the Nangate45 cell library, and MATLAB simulations were performed to verify the designed filter’s magnitude response and performance. Synthesis results indicate that the proposed design achieves nearly 70% reduction in energy (power-delay product) with a negligible deviation of the frequency response from the floating-point implementation. Experiments on acoustic noise suggest that the proposed digital A-weighting filter can be deployed in environmental noise measurement applications without any notable performance degradation.

• Jezik: Angleški jezik
• Ključne besede: band-pass digital filters, A-weighting filter, approximate computing, approximate filter, noise sensing
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FRI - Fakulteta za računalništvo in informatiko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 22 str.
• Številčenje: Vol. 21, iss. 3, art. 732
• PID: 20.500.12556/RUL-134881
• UDK: 004
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s21030732
• COBISS.SI-ID: 48247043
• Datum objave v RUL: 10.02.2022

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.02.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: pasovno prepustni digitalni filtri, A-utežnostni filter, aproksimativno računanje, aproksimativni filter