A phase locking value (PLV) in electrocorticography is an essential indicator for analysis of cognitive activities and detection of severe diseases such as seizure of epilepsy. The PLV computation requires a simultaneous pursuit of high-throughput and low-cost implementation in hardware acceleration. The PLV computation consists of bandpass filtering, Hilbert transform, and mean phase coherence (MPC) calculation. The MPC calculation includes trigonometric functions and divisions, and these calculations require a lot of computational amounts. This paper proposes an MPC calculation method that removes high-cost operations from the original MPC with mathematically identical derivations while the conventional methods sacrifice either computational accuracy or throughput. This paper also proposes a hardware implementation of MPC calculator whose latency is 21 cycles and pipeline interval is five cycles. Compared with the conventional implementation with the same standard cell library, the proposed implementation marks 2.8 times better hardware implementation efficiency that is defined as throughput per gate counts.
Tomoki SUGIURA
the Graduate School of Osaka University
Jaehoon YU
the Graduate School of Osaka University
Yoshinori TAKEUCHI
the Graduate School of Osaka University
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Tomoki SUGIURA, Jaehoon YU, Yoshinori TAKEUCHI, "Phase Locking Value Calculator Based on Hardware-Oriented Mathematical Expression" in IEICE TRANSACTIONS on Fundamentals,
vol. E101-A, no. 12, pp. 2254-2261, December 2018, doi: 10.1587/transfun.E101.A.2254.
Abstract: A phase locking value (PLV) in electrocorticography is an essential indicator for analysis of cognitive activities and detection of severe diseases such as seizure of epilepsy. The PLV computation requires a simultaneous pursuit of high-throughput and low-cost implementation in hardware acceleration. The PLV computation consists of bandpass filtering, Hilbert transform, and mean phase coherence (MPC) calculation. The MPC calculation includes trigonometric functions and divisions, and these calculations require a lot of computational amounts. This paper proposes an MPC calculation method that removes high-cost operations from the original MPC with mathematically identical derivations while the conventional methods sacrifice either computational accuracy or throughput. This paper also proposes a hardware implementation of MPC calculator whose latency is 21 cycles and pipeline interval is five cycles. Compared with the conventional implementation with the same standard cell library, the proposed implementation marks 2.8 times better hardware implementation efficiency that is defined as throughput per gate counts.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E101.A.2254/_p
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@ARTICLE{e101-a_12_2254,
author={Tomoki SUGIURA, Jaehoon YU, Yoshinori TAKEUCHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Phase Locking Value Calculator Based on Hardware-Oriented Mathematical Expression},
year={2018},
volume={E101-A},
number={12},
pages={2254-2261},
abstract={A phase locking value (PLV) in electrocorticography is an essential indicator for analysis of cognitive activities and detection of severe diseases such as seizure of epilepsy. The PLV computation requires a simultaneous pursuit of high-throughput and low-cost implementation in hardware acceleration. The PLV computation consists of bandpass filtering, Hilbert transform, and mean phase coherence (MPC) calculation. The MPC calculation includes trigonometric functions and divisions, and these calculations require a lot of computational amounts. This paper proposes an MPC calculation method that removes high-cost operations from the original MPC with mathematically identical derivations while the conventional methods sacrifice either computational accuracy or throughput. This paper also proposes a hardware implementation of MPC calculator whose latency is 21 cycles and pipeline interval is five cycles. Compared with the conventional implementation with the same standard cell library, the proposed implementation marks 2.8 times better hardware implementation efficiency that is defined as throughput per gate counts.},
keywords={},
doi={10.1587/transfun.E101.A.2254},
ISSN={1745-1337},
month={December},}
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TY - JOUR
TI - Phase Locking Value Calculator Based on Hardware-Oriented Mathematical Expression
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2254
EP - 2261
AU - Tomoki SUGIURA
AU - Jaehoon YU
AU - Yoshinori TAKEUCHI
PY - 2018
DO - 10.1587/transfun.E101.A.2254
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E101-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2018
AB - A phase locking value (PLV) in electrocorticography is an essential indicator for analysis of cognitive activities and detection of severe diseases such as seizure of epilepsy. The PLV computation requires a simultaneous pursuit of high-throughput and low-cost implementation in hardware acceleration. The PLV computation consists of bandpass filtering, Hilbert transform, and mean phase coherence (MPC) calculation. The MPC calculation includes trigonometric functions and divisions, and these calculations require a lot of computational amounts. This paper proposes an MPC calculation method that removes high-cost operations from the original MPC with mathematically identical derivations while the conventional methods sacrifice either computational accuracy or throughput. This paper also proposes a hardware implementation of MPC calculator whose latency is 21 cycles and pipeline interval is five cycles. Compared with the conventional implementation with the same standard cell library, the proposed implementation marks 2.8 times better hardware implementation efficiency that is defined as throughput per gate counts.
ER -