A Novel and High Performance Noise Cancellation Device for Battlefield Applications

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-09-C-0300
Agency Tracking Number: N091-024-0476
Amount: $150,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2009
Solicitation Topic Code: N091-024
Solicitation Number: 2009.1
Small Business Information
13619 Valley Oak Circle, ROCKVILLE, MD, 20850
DUNS: 620282256
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: Y
Principal Investigator
 Chiman Kwan
 Chief Technology Officer
 (240) 505-2641
Business Contact
 Chihwa Yung
Title: Chief Technology Officer
Phone: (301) 315-2322
Email: chihwa.yung@signalpro.net
Research Institution
We propose a novel, high performance, and standalone system for improving close air support (CAS) effectiveness. First, we propose a standalone noise cancellation device (NCD) that can be inserted between the handset and the transceiver. As a result, there is no change to the existing communication system. The NCD is self-powered from its own battery and equipped with a microphone and a digital signal processing (DSP) chip to process the signals from the handset mic and the mic in the NCD. Second, in the NCD, we propose to apply blind source separation (BSS) algorithms to untangle speech from background noises. One BSS method is the Independent Component Analysis (ICA) and another method is known as Adaptive Decorrelation Filter (ADF). Our team has applied both ICA and ADF to various applications. Third, since there may still be residual noise after the BSS stage, we propose to apply a fast convergence adaptive filter to further eliminate the residual background noise. The particular adaptive filter was developed by this team some time ago and can at least double the speed of convergence as compared to a conventional adaptive scheme. The proposed algorithms will be implemented in DSP in Phase 2.

* Information listed above is at the time of submission. *

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