||Wright-Patterson AFB, OH 454337542
Research opportunities exist in distributed, netted radar systems for detecting difficult (low cross section, low Doppler) targets embedded in severe clutter backgrounds. A distributed network of radars systems, including multiple input multiple output (MIMO), consists of multiple radar stations netted together through data communication links. Traditional netted radar systems normally comprise several monostatic radar systems, each operating at a different carrier frequency to avoid the interference and detection confusion among the radar stations in the system. As a result, the multiple radar stations in the system are incapable of operating in a bistatic or a multistatic mode. The strong capabilities of bistatic and multistatic radar systems are well known. An improved netted radar system is one that can simultaneously operate in both bistatic and monostatic modes. In this case, all radar stations are assumed to operate at the same carrier frequency and are coordinated and controlled by a coherent, signal-level fusion processing unit. Such a system not only significantly improves radar performance in target search, tracking, and recognition, but also effectively addresses emerging radar challenges. However, many fundamental challenges exist and need to be addressed. We seek novel methods of waveform design (specifically orthogonal or quasi-orthogonal waveforms) for proper radar functioning. New and robust adaptive processing techniques capable of operating in both bistatic and multistatic environments are also sought. For airborne and spaceborne applications, the geometry-induced Doppler dispersion significantly degrades the performance of adaptive processing techniques such as Space-Time Adaptive Processing (STAP). Multistatic clutter characterization techniques are also desired for better understanding of the impact of clutter on detection performance in these environments. Finally, depending on whether all data is sent to the fusion processing unit for detection purposes (centralized processing), or individual detections made at the sensor level are sent to the fusion center (decentralized processing), new signal processing techniques are desired that cohere signals across multiple distributed radar apertures.
Fishler E, et al: IEEE Transactions on Signal Processing 54(3): 823, 2006
Chen CY, Vaidyanathan PP: IEEE Transactions on Signal Processing 56(2): 623, 2008
Distributed sensing; Netted systems; MIMO radar; Waveform design; Centralized processing; Decentralized processing; Bistatic/multistatic STAP; Fusion processing;