Effect of finite word-length on SqNr, area and power for real-valued serial FFT

Nanda K. Unnikrishnan, Mario Garrido, Keshab K Parhi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Modern applications for DSP systems are increasingly constrained by tight area and power requirements. Therefore, it is imperative to analyze effective strategies that work within these requirements. This paper studies the impact of finite word-length arithmetic on the signal to quantization noise ratio (SQNR), power and area for a real-valued serial FFT implementation. An experiment is set up using a hardware description language (HDL) to empirically determine the tradeoffs associated with the following parameters: (i) the input word-length, (ii) the word-length of the rotation coefficients, and (iii) length of the FFT on performance (SQNR), power and area. The results of this paper can be used to make design decisions by careful selection of word-length to achieve a reduction in area and power for an acceptable loss in SQNR.

Original languageEnglish (US)
Title of host publication2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728103976
DOIs
StatePublished - Jan 1 2019
Event2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Sapporo, Japan
Duration: May 26 2019May 29 2019

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2019-May
ISSN (Print)0271-4310

Conference

Conference2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019
CountryJapan
CitySapporo
Period5/26/195/29/19

Fingerprint

Fast Fourier transforms
Computer hardware description languages
Experiments

Keywords

  • Area
  • FFT
  • Power
  • Real-valued FFT
  • SQNR
  • Serial commutator

Cite this

Unnikrishnan, N. K., Garrido, M., & Parhi, K. K. (2019). Effect of finite word-length on SqNr, area and power for real-valued serial FFT. In 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings [8702289] (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2019-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2019.8702289

Effect of finite word-length on SqNr, area and power for real-valued serial FFT. / Unnikrishnan, Nanda K.; Garrido, Mario; Parhi, Keshab K.

2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2019. 8702289 (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2019-May).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Unnikrishnan, NK, Garrido, M & Parhi, KK 2019, Effect of finite word-length on SqNr, area and power for real-valued serial FFT. in 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings., 8702289, Proceedings - IEEE International Symposium on Circuits and Systems, vol. 2019-May, Institute of Electrical and Electronics Engineers Inc., 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019, Sapporo, Japan, 5/26/19. https://doi.org/10.1109/ISCAS.2019.8702289
Unnikrishnan NK, Garrido M, Parhi KK. Effect of finite word-length on SqNr, area and power for real-valued serial FFT. In 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2019. 8702289. (Proceedings - IEEE International Symposium on Circuits and Systems). https://doi.org/10.1109/ISCAS.2019.8702289
Unnikrishnan, Nanda K. ; Garrido, Mario ; Parhi, Keshab K. / Effect of finite word-length on SqNr, area and power for real-valued serial FFT. 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2019. (Proceedings - IEEE International Symposium on Circuits and Systems).
@inproceedings{c000439688284cb18e0b9530ebfcaf53,
title = "Effect of finite word-length on SqNr, area and power for real-valued serial FFT",
abstract = "Modern applications for DSP systems are increasingly constrained by tight area and power requirements. Therefore, it is imperative to analyze effective strategies that work within these requirements. This paper studies the impact of finite word-length arithmetic on the signal to quantization noise ratio (SQNR), power and area for a real-valued serial FFT implementation. An experiment is set up using a hardware description language (HDL) to empirically determine the tradeoffs associated with the following parameters: (i) the input word-length, (ii) the word-length of the rotation coefficients, and (iii) length of the FFT on performance (SQNR), power and area. The results of this paper can be used to make design decisions by careful selection of word-length to achieve a reduction in area and power for an acceptable loss in SQNR.",
keywords = "Area, FFT, Power, Real-valued FFT, SQNR, Serial commutator",
author = "Unnikrishnan, {Nanda K.} and Mario Garrido and Parhi, {Keshab K}",
year = "2019",
month = "1",
day = "1",
doi = "10.1109/ISCAS.2019.8702289",
language = "English (US)",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings",

}

TY - GEN

T1 - Effect of finite word-length on SqNr, area and power for real-valued serial FFT

AU - Unnikrishnan, Nanda K.

AU - Garrido, Mario

AU - Parhi, Keshab K

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Modern applications for DSP systems are increasingly constrained by tight area and power requirements. Therefore, it is imperative to analyze effective strategies that work within these requirements. This paper studies the impact of finite word-length arithmetic on the signal to quantization noise ratio (SQNR), power and area for a real-valued serial FFT implementation. An experiment is set up using a hardware description language (HDL) to empirically determine the tradeoffs associated with the following parameters: (i) the input word-length, (ii) the word-length of the rotation coefficients, and (iii) length of the FFT on performance (SQNR), power and area. The results of this paper can be used to make design decisions by careful selection of word-length to achieve a reduction in area and power for an acceptable loss in SQNR.

AB - Modern applications for DSP systems are increasingly constrained by tight area and power requirements. Therefore, it is imperative to analyze effective strategies that work within these requirements. This paper studies the impact of finite word-length arithmetic on the signal to quantization noise ratio (SQNR), power and area for a real-valued serial FFT implementation. An experiment is set up using a hardware description language (HDL) to empirically determine the tradeoffs associated with the following parameters: (i) the input word-length, (ii) the word-length of the rotation coefficients, and (iii) length of the FFT on performance (SQNR), power and area. The results of this paper can be used to make design decisions by careful selection of word-length to achieve a reduction in area and power for an acceptable loss in SQNR.

KW - Area

KW - FFT

KW - Power

KW - Real-valued FFT

KW - SQNR

KW - Serial commutator

UR - http://www.scopus.com/inward/record.url?scp=85066788296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066788296&partnerID=8YFLogxK

U2 - 10.1109/ISCAS.2019.8702289

DO - 10.1109/ISCAS.2019.8702289

M3 - Conference contribution

AN - SCOPUS:85066788296

T3 - Proceedings - IEEE International Symposium on Circuits and Systems

BT - 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

ER -