HTDV TechEnterprise 2005

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HTDV TechEnterprise 2005
Multipath Fading Compensation Technique Using a
Phase-Conjugating Array Referentia Systems
Incorporated in partnership with the University
of Hawaii
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University of Hawaii and Referentia
Maritime Communications Problems Multipath
Reflections

• Unmanned Surface Vehicles (USVs) play important
  roles in high-risk intelligence, surveillance,
  and reconnaissance missions
• Mission success depends on reliable
  communications link
• Maritime communications suffer from multipath
  fading due to water surface reflections

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University of Hawaii and Referentia
Multipath Issues and State of the Art

• Multipath fading can be reduced
• Using multiple antennas
• Tightly focused beams
• Signal processing
• Special modulation schemes
• However
• Multipath fading not completely eliminated
• Not effective in mobile scenarios

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University of Hawaii and Referentia
Turning Multipath Issue into Asset

• Multipath strengthens signal
• Use multipath as additional signal paths through
  Phase Conjugation
• Retrodirective array leverages additional signal
  paths mathematically, without complex controllers

• Technique proven at the University of Hawaii
  Microwave Milimeter-Wave Research Laboratory
  (MMRL) for simplified terrestrial scenario
• Develop model to explore, possibly culminating in
  physical demonstration

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University of Hawaii and Referentia
Partners for Stronger Technology in Hawaii

• Strong shared belief in promoting workforce
  development
• Partnering to provide technology opportunities to
  students
• Exposes students to practical industry experience
• Facilitates idea exchange between industry and
  academia
• Enhances University recruiting efforts
• Expands local talent pool
• Reduces brain drain
• Strengthens Hawaii companies
• Improves Hawaiis technical economy image

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Referentia Background

• Incorporated in 1996 in Hawaii 8(a)/SDB
  Certified in 2001
• Innovative Advanced Computing, Software
  Development and Systems Engineering company
  supporting commercial and government clients.
• Interim Top Secret Facility Clearance
• History of successful and award-winning
  commercial products
• Including 2002 Best Java Training Program and
  2002 Finalist Web Services Training Program

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Referentia Core Capabilities

• Advanced Computing
• Agent-based Modeling and Simulation/Data Farming
• Intelligent Architectures
• Bandwidth Data Optimization Smart Data Flows
• Data Mining/Data Warehousing
• Systems Engineering
• Coalition Information Sharing
• Network Operations Support
• Visual UI Design
• Program/Project Management
• eLearning

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HTDV TechEnterprise 2005
Thank You!
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University of Hawaii and Referentia
Multipath Communications Phase Conjugating
Array Use an innovative antenna technology to
reduce signal fading from multipath propagation
effects. Retrodirective Antenna
Research Multipath signals will be used to
enhance communications in severe multipath
environments. In the ideal case, the fading can
be completely avoided and multipath propagation
will actually improve the radio channel. The
system uses a single non-steered retrodirective
antenna to send a phase-conjugated signal back to
the opposite site.
Benefit Improved communications in severe
maritime communications environments, potential
use in other commercial markets Challenges Produ
cing model to accurately simulate and analyze
phase conjugation Production of prototype for
marine investigation Maturity of
Technology Concept has been demonstrated in
laboratory conditions
Sponsor Office of Naval Research, through High
Technology Development Venture Partners
University of Hawaii and Referentia
Systems Contact Info University of Hawaii
Wayne Shiroma wayne.shiroma_at_hawaii.edu, 808 956
7218 Referentia Systems Anthony
Wong awong_at_referentia.com, 808 423 1900 x121