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

Nanda K. Unnikrishnan; Mario Garrido; Keshab K. Parhi

doi:10.1109/ISCAS.2019.8702289

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

Nanda K. Unnikrishnan, Mario Garrido, Keshab K. Parhi

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

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 language	English (US)
Title of host publication	2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728103976
DOIs	https://doi.org/10.1109/ISCAS.2019.8702289
State	Published - 2019
Event	2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Sapporo, Japan Duration: May 26 2019 → May 29 2019

Publication series

Name	Proceedings - IEEE International Symposium on Circuits and Systems
Volume	2019-May
ISSN (Print)	0271-4310

Conference

Conference	2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019
Country/Territory	Japan
City	Sapporo
Period	5/26/19 → 5/29/19

Bibliographical note

Funding Information:
This research was supported in part by the National Science Foundation under grant number CCF-1814759.

Publisher Copyright:
© 2019 IEEE

Keywords

Area
FFT
Power
Real-valued FFT
SQNR
Serial commutator

Publisher link

10.1109/ISCAS.2019.8702289

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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 Article 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 proceeding › Conference 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). doi: 10.1109/ISCAS.2019.8702289

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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.}",

note = "Funding Information: This research was supported in part by the National Science Foundation under grant number CCF-1814759. Publisher Copyright: {\textcopyright} 2019 IEEE; 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 ; Conference date: 26-05-2019 Through 29-05-2019",

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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.

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

Abstract

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Bibliographical note

Keywords

Publisher link

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