Power-Efficient Adaptive-and-Robust Link OFDM (PEARL-OFDM)

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N66001-11-C-5221
Agency Tracking Number: N093-218-0914
Amount: $483,453.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: N093-218
Solicitation Number: 2009.3
Small Business Information
315 Commerce Park Road, North Kingstown, RI, -
DUNS: 041546834
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Marcos Bergamo
 Vice President of Technol
 (401) 295-0062
Business Contact
 Michael Sherry
Title: President
Phone: (401) 295-0062
Email: msherry@appliedradar.com
Research Institution
Key obstacles to extending OFDM to wireless links and networks at high frequencies with dynamic channels are inherent low performance to Doppler and power amplifier operation with high backoff. Other significant obstacles are multipath and impulsive noise. PEARL provides a solid communications infrastructure with support for incremental relevant capabilities including TRANSEC and LPD/LPI. For this, PEARL integrates two layers of OFDM technologies with different Truly Shift Orthogonal Codes (TSOC): one with randomly chirped codes and intrinsic TRANSEC characteristics dedicated to"variable rates"and another with linearly chirped codes and intrinsic robustness to Doppler. A novel Split-Phase Shift-Keying modulation overlay layer"makes"resulting OFDM signals suitable for saturated power amplifiers. PEARL-OFDM multi-layer architecture enables full-range rates that maximizes connectivity, adds unparalleled robustness to high-rate Doppler, has inherent robustness to narrowband fading and impulsive noise and achieves near-optimum power conditioning of typical variable envelope signals enabling power amplifiers operation at near saturation. In Phase I Applied Radar designed, developed the algorithms and simulated the performance of the combined PEARL technologies. In Phase II we will build a software-define-radio testbed including channel emulators, port algorithms, demonstrate the PEARL practical feasibility and performance and initiate its transition to an actual JTRS radio platform.

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

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