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Communication-Embedded RF Seeker


OBJECTIVE: Research and develop multi-function radar seeker technology for application to air-delivered weapons. DESCRIPTION: Software-configurable radar systems have allowed radar engineers the flexibility to carry out many modes using a single, flexible hardware configuration. The Weapon Seeker Sciences Branch of the Air Force Research Laboratory Munitions Directorate (AFRL/RWWS) has capitalized on such concept and small, low-cost multi-mode radar seekers (i.e.: radar seekers that implement a combination of modes such as Synthetic Aperture Radar (SAR), Doppler Beam Sharpening (DBS), Ground Moving Target Indicator, High Range Resolution, acquisition, single and multi target tracking) have become viable solutions for weapon applications. In recent years, the same software defined concept has evolved to allow for practical implementations of multi-functional RF systems. Functions such as communications, electronic warfare (EW), navigation, and collision avoidance can be integrated to complement the main radar functions. High-speed communication is of particular interest for its use in weapon"s In-Flight Targeting Updates (IFTUs), Battle Damage Assessment (BDA), and potential future use in cooperative networks. It is the intent of this solicitation to develop a concept and architecture for a multi-function radar seeker capable of embedded communications and develop an integrated waveform generation and receiver subsystem capable of meeting the requirements for the concept. As a minimum, the subsystem must have the necessary computational capability to control and process the waveforms necessary for a high performance, multi-mode pulsed-doppler radar seeker operating in the SAR mode with 6"resolution and having three down-converted receive monopulse channels. The subsystem should also support diverse high data rate waveforms compatible with commercial wireless applications for operation as a standalone radio and in the form of inter-pulse modulation within a set of radar pulses. It is expected the subsystem to follow a similar software architecture as a software defined radio and perform within the limited power and size limitations of a radar seeker (e.g. for radar SWAP: Size<100in3, Weight<6lbs, Prime power<100W). PHASE I: The phase I effort should refine the architecture for a multi-function radar seeker capable of embedded communications, define the hardware and software requirements for the integrated waveform generation and receiver subsystem and perform a preliminary design. PHASE II: The phase II effort should further develop the design and demonstrate functionality of a brassboard prototype of the integrated waveform generation and receiver subsystem. PHASE III: The developed brassboard prototype should be integrated and demonstrated as a full-up RF system. REFERENCES: 1. J. Proakis, M. Salehi, Digital Communications. New York: McGraw-Hill, 2008. 2. N. Levanon, E. Mozeson, Radar Signals. John Wiley & Sons, 2004 3. M. Skolnik, Introduction to Radar Systems, 3rd ed., McGraw-Hill, 2001. 4. G. V. Trunk et al.,"The advanced multifunction RF concept,"IEEE Trans Microwave Theory Tech., vol. 53, no. 3, pt. 2, pp. 10091020, Mar. 2005. 5. M. Roberton and E. R. Brown,"Integrated radar and communication based on chirped spread-spectrum techniques,"in IEEE MTT-S International, Microwave Symposium Digest, Jun. 2003, vol. 1, pp. 611614.
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