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http://dx.doi.org/10.7776/ASK.2019.38.1.009

The efficient implementation of the multi-channel active noise controller using a low-cost microcontroller unit  

Chung, Ik Joo (Department of Electrical & Electronics Engineering, Kangwon National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.38, no.1, 2019 , pp. 9-22 More about this Journal
Abstract
In this paper, we propose a method that can be applied to the efficient implementation of multi-channel active noise controller. Since the normalized MFxLMS (Modified Filtered-x Least Mean Square) algorithm for the multi-channel active noise control requires a large amount of computation, the difficulty has lied in implementing the algorithm using a low-cost MCU (Microcontoller Unit). We implement the multi-channel active noise controller efficiently by optimizing the software based on the features of the MCU. By maximizing the usage of single-cycle MAC (Multiply- Accumulate) operations and minimizing move operations of the delay memory, we can achieve more than 3 times the performance in the aspect of computational optimization, and by parellel processing using the auxillary processor included in the MCU, we can also obtain more than 4 times the performance. In addition, the usage of additional parts can be minimized by maximizing the usage of the peripherals embedded in the MCU.
Keywords
Multi-channel active noise controller; Normalized MFxLMS (Modified Filtered-x Least Mean Square); Low-cost MCU (Microcontoller Unit); Parallel processing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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