Title: A Flexible Multi-Channel Feedback FxLMS Architecture for FPGA Platforms
Authors: Klemd, Alexander 
Klauer, Bernd 
Timmermann, Johannes 
Sachau, Delf  
Language: en
Keywords: ANC;VHDL;Feedback FxLMS;Multiple Channels;Active Headrest;Hardware Design;FPGA
Subject (DDC): DDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Issue Date: 2021
Publisher: IEEE
Document Type: Conference Object
Page Start: 319
Page End: 326
Pages: 8
Conference: 31st International Conference on Field-Programmable Logic and Applications (FPL) 2021 
Abstract: 
The most used algorithm in active noise control (ANC) applications is the filtered-x least mean square (FxLMS). For large scale systems with multiple inputs and outputs the computational demand of the FxLMS is rising rapidly. Conventional solutions, running on digital signal processors (DSPs), have limitations in parallel computing. In this work a parameterizable multiple input-multiple output (MIMO) feedback FxLMS architecture for field-programmable gate array (FPGA) platforms is presented that can easily be optimized for high-performance or resource efficient computation. The implementation is validated in a real-time practical application using an active headrest with 2 x 2 channels. The noise reduction is evaluated over various configurations with increasing performance and the respective synthesis results are presented. Here the noise reduction does benefit from the additional computational performance gains. An additional configuration with 11 x 11 channels and filter lengths of 2049 at a sample rate of 40 kHz is shown as a benchmark on high-end FPGAs.
Organization Units (connected with the publication): Technische Informatik 
Mechatronik 
ISBN: 978-1-6654-3759-2
DOI: 10.1109/FPL53798.2021.00063
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