Hardware Design and Implementation for Empirical Mode Decomposition

Hilbert-Huang transform (HHT) is an effective method for analyzing nonlinear systems and nonstationary signals. Empirical mode decomposition (EMD) is the core of HHT. In this paper, a flexible, low cost, and high-performance silicon intellectual property (SIP) core for the EMD is proposed to meet the high-speed requirements of various EMD applications. Variables in the proposed EMD SIP are parameterized as much as possible. Using the proposed auxiliary software system, the EMD SIP generator, users can choose various precisions, data lengths, extrema extraction methods, envelope generation methods, stopping criterion methods, and computation units for different EMD applications. All circuits generated using the proposed EMD SIP generator can be operated at 200 MHz using the 90-nm cell library from the Taiwan Semiconductor Manufacturing Company (TSMC), and they can be easily used for various applications and hardware architectures.

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