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Design, Simulation and Implementation of an Active Sound-Noise Cancellation System for Use in a Cockpit Intercommunication System

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Author(s): O. Sharifi-Tehrani

Journal: Journal of Applied Research and Technology
ISSN 1665-6423

Volume: 10;
Issue: 5;
Start page: 731;
Date: 2012;
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Keywords: active noise control | sound denoising | adaptive FIR filter | intercommunication system | airplane cockpit | FPGA | electronic warfare.

ABSTRACT
In this paper, an active noise control system for denoising the intercommunication signal of an airplane cockpit isproposed. Noise sources such as engines degrade the quality of the intercommunication signal, especially in the caseof the pilot and copilot headsets. A two-microphone active adaptive noise controller is designed by using an adaptiveFIR filter in an active structure. The designed system is simulated and also implemented in real environment usingreal speech signals, periodic noise and AWGN noise. Also, an FPGA-based hardware implementation utilizing a novelmethod is provided. The whole design is considered an FPGA hardware core with low resource utilizations which issuitable for HW/SW codesign and System-on-Programmable-Chip (SoPC) applications. The codes have been writtenby using the VHDL93 hardware description language, the XilKernel embedded operating system and a finite statemachine. The obtained results showed competent functionality and performance of the proposed system. This ICSnoise removal architecture can be used on any cargo, civil or fighter platform (such as C-130, IR-AN 140 and F5-F)and also in radar and electronic warfare (EW) systems (for clutter/interference compensation) with minimum hardwareor software changes.
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