Channel and Interference adaptive SATCOM Digital beam-former

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8750-13-C-0064
Agency Tracking Number: F131-048-0875
Amount: $143,071.00
Phase: Phase I
Program: SBIR
Awards Year: 2013
Solicitation Year: 2013
Solicitation Topic Code: AF131-048
Solicitation Number: 2013.1
Small Business Information
CO, Centennial, CO, 80111-6427
DUNS: 122032006
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Damon VanBuren
 Principal Engineer
 (303) 784-7671
Business Contact
 Chris Miller
Title: Sr. Vice President, Programs
Phone: (303) 790-8499
Research Institution
ABSTRACT: Digital beamforming is a key to maximum bandwidth utilization and flexibility for communication satellites. Adaptive beamforming further enhances this flexibility by more effectively removing interferers in the spatial domain. However, adaptive beamforming doesn't account for frequency differences in interferers, and may be difficult to implement for varying beam-bandwidths. Adding channelization before the beamformer and implementing the adaptive beamformer on a subchannel level resolves these issues. By making the adaptive beamformer work on a beam-subchannel basis, the beamformer processing resources can be easily assigned to beams ranging from a few kHz of bandwidth to hundreds of MHz. Additionally, the beamformer can adapt more effectively, since interferers are optimally nulled within each subchannel. This SBIR focuses on verifying the effectiveness of adaptive beamforming on a subchannel level, using polyphase filter banks for preprocessing. The research compares this approach with a more traditional approach using Digital Down Conversion (DDC) through performance simulations. It also evaluates the feasibility of implementation on SEAKR's advanced onboard processing hardware systems. Advanced processing systems, rapid signal processing design methodology, channelizer development experience, and knowledge of adaptive beamforming algorithms and implementations make SEAKR an ideal choice for performing this work. BENEFIT: Benefits of this research include improved bandwidth utilization and flexibility for communication satellites, improved response to atmospheric effects, and reduction of interference in the spatial domain. Additionally, the techniques proposed here enable practical implementation of sophisticated, high performance adaptive beamforming on existing onboard processing hardware. Commercialization opportunities are many, and include the WGS mission, the space platforms used by Intelsat and Inmarsat, among others. Commercial satellites have used RF beamforming for many years, and are beginning to move to more flexible beamforming approaches, as the desire for better bandwidth reuse drives system performance and flexibility.

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

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