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Hybrid Low-Cost Predistortion Solutions for Next Generation Satellite Transponder Linearization

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9453-21-C-0539
Agency Tracking Number: F181-041-0403
Amount: $750,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: AF181-041
Solicitation Number: 18.1
Timeline
Solicitation Year: 2018
Award Year: 2021
Award Start Date (Proposal Award Date): 2021-04-15
Award End Date (Contract End Date): 2023-04-15
Small Business Information
20271 Goldenrod Lane Suite 2066
Germantown, MD 20876-0000
United States
DUNS: 967349668
HUBZone Owned: No
Woman Owned: Yes
Socially and Economically Disadvantaged: No
Principal Investigator
 Genshe Chen
 CTO
 (240) 481-5397
 gchen@intfusiontech.com
Business Contact
 Yingli Wu
Phone: (949) 596-0057
Email: yingliwu@intfusiontech.com
Research Institution
N/A
Abstract

In military satellite communication (MILSATCOM), the downlink transmission signals suffer from nonlinear distortions caused by the high power amplifier (HPA) of the satellite transponder, which can be characterized as amplitude modulation-to-amplitude modulation (AM-AM), and amplitude modulation-to-phase modulation (AM-PM) effects. To solve this problem, Intelligent Fusion Technology, Inc. (IFT) has conducted fruitful research on HPA linearization by using both physical and machine learning predistortion (PD) modeling techniques. An excellent linearization performance was achieved in the presence of various jamming signals by using the proposed hybrid PD solution. To develop the on-ground PD with full-fledged functions, and make it a successful product for Air Force’s need, IFT and its partner propose to refine the proposed system architecture with hub hardware modification only, and the best modulation and coding (MODCOD) mode is selected accordingly at user terminals to linearize the HPA. The proposed physical and machine learning PD models will be further assessed and completed by taking more practical MILSATCOM conditions into account. IFT proposes to test the developed PD system on our software defined radio (SDR) SATCOM testbed, and implement it on field programmable gate array (FPGA). Finally, the developed PD system prototype will be integrated to the actual MILSATCOM system.

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

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