CeMux: Maximizing the Accuracy of Stochastic Mux Adders and an Application to Filter Design
CeMux: Maximizing the Accuracy of Stochastic Mux Adders and an Application to Filter Design
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CeMux:最大化随机复用加法器的精度及其在滤波器设计中的应用
DOI:
10.1145/3491213
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发表时间:
2022
影响因子:
1.4
通讯作者:
Hayes, John P.
中科院分区:
文献类型:
--
作者:
Baker, Timothy J.;Hayes, John P.
Stochastic computing (SC) is a low-cost computational paradigm that has promising applications in digital filter design, image processing, and neural networks. Fundamental to these applications is the weighted addition operation, which is most often implemented by a multiplexer (mux) tree. Mux-based adders have very low area but typically require long bitstreams to reach practical accuracy thresholds when the number of summands is large. In this work, we first identify the main contributors to mux adder error. We then demonstrate with analysis and experiment that two new techniques, precise sampling and full correlation, can target and mitigate these error sources. Implementing these techniques in hardware leads to the design of CeMux (Correlation-enhanced Multiplexer), a stochastic mux adder that is significantly more accurate and uses much less area than traditional weighted adders. We compare CeMux to other SC and hybrid designs for an electrocardiogram filtering case study that employs a large digital filter. One major result is that CeMux is shown to be accurate even for large input sizes. CeMux's higher accuracy leads to a latency reduction of 4× to 16× over other designs. Furthermore, CeMux uses about 35% less area than existing designs, and we demonstrate that a small amount of accuracy can be traded for a further 50% reduction in area. Finally, we compare CeMux to a conventional binary design and we show that CeMux can achieve a 50% to 73% area reduction for similar power and latency as the conventional design but at a slightly higher level of error.
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DOI:
10.23919/date.2019.8714937
发表时间:
2019
期刊:
2019 Design, Automation & Test in Europe Conference & Exhibition (DATE)
影响因子:
--
作者:
S. R. Faraji;M. Hassan Najafi;Bingzhe Li;David J. Lilja;K. Bazargan
通讯作者:
K. Bazargan
DOI:
--
发表时间:
2021
期刊:
2021 IEEE Biomedical Circuits and Systems Conference (BioCAS
影响因子:
--
作者:
Baker, Timothy J.;Sun, Yiqiu;Hayes, John P.
通讯作者:
Hayes, John P.
DOI:
10.1109/dsd.2014.75
发表时间:
2014
期刊:
2014 17th Euromicro Conference on Digital System Design
影响因子:
--
作者:
Pai;J. Hayes
通讯作者:
J. Hayes
DOI:
--
发表时间:
2014
期刊:
IEEE International New Circuits and Systems Conference
影响因子:
--
作者:
Bert Moons;M. Verhelst
通讯作者:
M. Verhelst
DOI:
10.7873/date2014.089
发表时间:
2014
期刊:
2014 Design, Automation & Test in Europe Conference & Exhibition (DATE)
影响因子:
--
作者:
Armin Alaghi;J. Hayes
通讯作者:
J. Hayes