IEICE TRANSACTIONS on Fundamentals
Low Power MAC Design with Variable Precision Support
Summary :
Many DSP applications such as FIR filtering and DCT (discrete cosine transformation) require multiplication with constants. Therefore, optimizing the performance of constant multiplication improves the overall performance of these applications. It is well-known that shifting can replace a constant multiplication if the constant is a power of two. In this paper, we extend this idea in such a way that by employing more than two barrel shifters, we can design highly efficient constant multipliers. We have found that by using two or three shifters, we can generate a large set of constants. Using these constants, we can execute a typical set of FIR or DCT applications with few errors. Furthermore, with variable precision support, we can carry out a fairly large class of DSP applications with high computational efficiency. Compared to conventional multipliers, we can achieve power savings of up to 56% with negligible computational errors.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.7 pp.1623-1632
- Publication Date
- 2009/07/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E92.A.1623
- Type of Manuscript
- PAPER
- Category
- Digital Signal Processing
Authors
Keyword
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Young-Geun LEE, Han-Sam JUNG, Ki-Seok CHUNG, "Low Power MAC Design with Variable Precision Support" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 7, pp. 1623-1632, July 2009, doi: 10.1587/transfun.E92.A.1623.
Abstract: Many DSP applications such as FIR filtering and DCT (discrete cosine transformation) require multiplication with constants. Therefore, optimizing the performance of constant multiplication improves the overall performance of these applications. It is well-known that shifting can replace a constant multiplication if the constant is a power of two. In this paper, we extend this idea in such a way that by employing more than two barrel shifters, we can design highly efficient constant multipliers. We have found that by using two or three shifters, we can generate a large set of constants. Using these constants, we can execute a typical set of FIR or DCT applications with few errors. Furthermore, with variable precision support, we can carry out a fairly large class of DSP applications with high computational efficiency. Compared to conventional multipliers, we can achieve power savings of up to 56% with negligible computational errors.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.1623/_p
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@ARTICLE{e92-a_7_1623,
author={Young-Geun LEE, Han-Sam JUNG, Ki-Seok CHUNG, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Low Power MAC Design with Variable Precision Support},
year={2009},
volume={E92-A},
number={7},
pages={1623-1632},
abstract={Many DSP applications such as FIR filtering and DCT (discrete cosine transformation) require multiplication with constants. Therefore, optimizing the performance of constant multiplication improves the overall performance of these applications. It is well-known that shifting can replace a constant multiplication if the constant is a power of two. In this paper, we extend this idea in such a way that by employing more than two barrel shifters, we can design highly efficient constant multipliers. We have found that by using two or three shifters, we can generate a large set of constants. Using these constants, we can execute a typical set of FIR or DCT applications with few errors. Furthermore, with variable precision support, we can carry out a fairly large class of DSP applications with high computational efficiency. Compared to conventional multipliers, we can achieve power savings of up to 56% with negligible computational errors.},
keywords={},
doi={10.1587/transfun.E92.A.1623},
ISSN={1745-1337},
month={July},}
Copy
TY - JOUR
TI - Low Power MAC Design with Variable Precision Support
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1623
EP - 1632
AU - Young-Geun LEE
AU - Han-Sam JUNG
AU - Ki-Seok CHUNG
PY - 2009
DO - 10.1587/transfun.E92.A.1623
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 7
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - July 2009
AB - Many DSP applications such as FIR filtering and DCT (discrete cosine transformation) require multiplication with constants. Therefore, optimizing the performance of constant multiplication improves the overall performance of these applications. It is well-known that shifting can replace a constant multiplication if the constant is a power of two. In this paper, we extend this idea in such a way that by employing more than two barrel shifters, we can design highly efficient constant multipliers. We have found that by using two or three shifters, we can generate a large set of constants. Using these constants, we can execute a typical set of FIR or DCT applications with few errors. Furthermore, with variable precision support, we can carry out a fairly large class of DSP applications with high computational efficiency. Compared to conventional multipliers, we can achieve power savings of up to 56% with negligible computational errors.
ER -
English
