Robust Adaptiive Coder for Optimizing Error Detection/Correction

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: F3060203C0229
Agency Tracking Number: 031-1278
Amount: $69,981.00
Phase: Phase I
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
BROADATA COMMUNICATIONS, INC.
2545 W. 237th Street, Suite K, Torrance, CA, 90505
DUNS: 004279860
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Barry Ambrose
 Systems Engineer
 (310) 530-1416
 bambrose@broadatacom.com
Business Contact
 Burt Walker
Title: CEO and President
Phone: (310) 530-1416
Email: alewis@broadatacom.com
Research Institution
N/A
Abstract
MDA requires optimized error detection/correction methods that permit highly-robust communication in nuclear or jamming environments. In this proposal, Broadata Communication Inc (BCI) proposes a unique Adaptive Trellis/Turbo Coding with 8-DPSK(Differential Phase Shift Keying), or ATT-D scheme that will significantly outperform the traditional coding schemes in a severe fading channel scheme. The ATT-D is a combined coding and modulation technique that uses signal-set expansion to provideredundancy for coding. The ATT-D can achieve significant coding gain without sacrificing data rate or requiring more bandwidth. To increase the bit error rate performance while maintaining the same bandwidth requirement, the ATT-D further uses adaptivelinear prediction. Using the recursive least-square algorithm, the prediction coefficient can be adapted to changing channel condition. By combining the Trellis coding scheme with the Turbo coder, the proposed ATT-D system will have a robust performance inboth low SNR (signal to noise ratio) and high fading channels. The superior performance of this system has been demonstrated with preliminary simulation results. A software demonstration will be fully conducted and the results will be demonstrated upon thecompletion of the Phase I project to show the feasibility and potential of the proposed ATT-D for MDA applications. In addition to MDA's In-Flight Interceptor Communications System (IFICS) application , this technology is also applicable for manymilitary, real-time, sensor data collection/processing operations and mission critical military/government communication network applications. The proposed technology is also applicable to any commercial network applications that can benefit from robustmission critical multimedia networks. Potential applications include, but are not limited to, robust commercial airline communications, collaborative security networks, robust interactive wireless network operations, and remote crisis management networks.

* information listed above is at the time of submission.

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