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High Dynamic Range (HDR) Improvements for Synthetic Aperature Radar (SAR)/Ground Moving Target Indicator (GMTI) and Passive/Bistatic Radar

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-19-P-1862
Agency Tracking Number: F182-106-0980
Amount: $149,948.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: AF182-106
Solicitation Number: 18.2
Timeline
Solicitation Year: 2018
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-02-28
Award End Date (Contract End Date): 2020-02-28
Small Business Information
4120 Commercial Center Dr Ste 500
Austin, TX 78744
United States
DUNS: 161214242
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Steven Beck
 Principal Investigator
 (512) 479-7732
 beck@spec.com
Business Contact
 Natalie Welp
Phone: (512) 479-7732
Email: welp@spec.com
Research Institution
N/A
Abstract

SPEC is proposing a fast range cell adaptive AGC, expanding the front end dynamic range to 140 dB or more. Modern wideband SAR imaging and GMTI radars require very high dynamic ranges to detect objects in ground clutter and especially in the presence of strong reflectors. Today’s wideband ADCs have only 12-14 bits, giving a SFDR of 60-75 dB. SPEC is currently delivering TRL8/9 radar transceivers with adaptive AGC giving an overall 110 dB dynamic range. SPEC proposes to use a new class of wideband ADC with built-in Fast Detection Bit that can immediately signal an FPGA and create range cell amplitude tracks. These range cell amplitude predictions directly feed to the AGC algorithm and control the variable attenuator on a range cell basis, providing the anticipated 140 dB or more of overall dynamic range. During Phase I, SPEC will integrate a wideband RF front end using demonstration boards, and will implement the fast range cell adaptive AGC algorithm. SPEC will generate synthetic and dynamic SAR or GMTI scenes, input these through the RF front end, and optimize the AGC and overall dynamic range to maximize STAP detection, image quality, and range performance metrics.

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

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