Advanced Order Linearizer for Satellite Communications

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911NF-12-C-0052
Agency Tracking Number: A121-041-0243
Amount: $99,824.00
Phase: Phase I
Program: SBIR
Awards Year: 2012
Solicitation Year: 2012
Solicitation Topic Code: A12-041
Solicitation Number: 2012.1
Small Business Information
2071 Lemoine Avenue Suite 302, Fo, NJ, -
DUNS: 145051095
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Johana Yan
 (858) 272-8800
Business Contact
 Houman Ghajari
Title: Director
Phone: (858) 272-8800
Research Institution
The Ka-/Q-band satellite systems offer potential for transportable and mobile communications through the effective use of the wide bandwidths available while requiring that adequate linearity performance be maintained. In environments where size and power conservation is of high importance, power consumption and heat dissipation in the power amplifier (PA) must be minimized. However, it is widely accepted that linearity and efficiency are competing constraints. To address these challenges, MaXentric Technologies proposes a cost-effective linearizer, ALASTx (Adaptive LineArizer for Satellite Transmitters), for high efficiency satellite transmitters, capable of better than -50 dBc ACPR and<2.5 degrees /dB AM-PM using multi-tone signals with modulation bandwidths up to 52 MHz while operating the PA at peak efficiency (0dB backoff). To achieve high linearity while simultaneously maintaining high efficiency, adaptive digital pre-distortion (ADPD) will be used on Ka-/Q-band PA (30-31 GHz and 43.5-45.5 GHz). ADPD offers exceptional linearization capabilities for wide-band systems and, as compared to other schemes, has become very cost-efficient by utilizing a small set of additional resources in an already-existing signal processing unit used for signal generation. Consequently, the ability to characterize an amplifier's nonlinearities and minimize their impact through signal processing has become paramount to remaining competitive in the power amplifier market.

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

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