Wideband Sub-Array Digital Receiver Exciter (DREX)

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0147-11-C-7697
Agency Tracking Number: B2-1718a
Amount: $999,999.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: MDA08-028
Solicitation Number: 2009.3
Small Business Information
210 Airport Street, Quonset Point, North Kingstown, RI, -
DUNS: 041546834
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 William Weedon
 (401) 295-0062
Business Contact
 Michael Sherry
Title: President
Phone: (401) 295-0062
Email: msherry@appliedradar.com
Research Institution
Next-generation ground-based BMD radar is anticipated to employ a scalable architecture with multiple low-cost transportable arrays employing hundreds of thousands of elements per array. Low-cost analog array panels are to be employed in the array, and will typically contain a digital receiver/exciter (DREX) behind a subarray group of typically 64 or 256 elements. The combination of element-level analog beam steering and subarray digital beamforming allows for multiple simultaneous receive beams which are digitally controlled. A wideband DREX increases target discrimination capability, along with a great degree of flexibility in the waveform control and anti-jam capability. Applied Radar is developing a DREX solution to meet the needs of next-generation BMD radar under a spiral development process. This DREX interfaces with the MIT/LL Radar Open Systems Architecture (ROSA) for beam-steering and waveform control as well as back-end radar processing. This proposed Phase 2 effort improves upon the current VME-based DREX hardware, and includes demonstrations with available array hardware. Additionally, further effort will be made towards integrating the DREX with the array hardware. Emerging chip-level transceiver technologies are to be investigated towards the goals of reducing DREX size, weight and cost. We also look at the possibility from the DREX perspective of separating the transmit and receive functions of the radar into physically separate arrays, as well as cohering multiple arrays.

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

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