A Novel and High Performance Noise Cancellation Device for Battlefield Applications

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$150,000.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
N68335-09-C-0300
Agency Tracking Number:
N091-024-0476
Solicitation Year:
2009
Solicitation Topic Code:
N091-024
Solicitation Number:
2009.1
Small Business Information
SIGNAL PROCESSING, INC.
13619 Valley Oak Circle, ROCKVILLE, MD, 20850
Hubzone Owned:
N
Socially and Economically Disadvantaged:
Y
Woman Owned:
Y
Duns:
620282256
Principal Investigator:
Chiman Kwan
Chief Technology Officer
(240) 505-2641
chiman.kwan@signalpro.net
Business Contact:
Chihwa Yung
Chief Technology Officer
(301) 315-2322
chihwa.yung@signalpro.net
Research Institution:
n/a
Abstract
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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