Development and evaluation of a multistatic ultrawideband random noise radar network

Matthew E. Nelms, Peter J. Collins
2011 2011 IEEE RadarCon (RADAR)  
As advances in shaping and materials continue to press the frontiers of signature reduction, the forward eyes and ears of operations, being a platform's onboard sensor systems, have kept pace with low observable designs by significantly reducing both intentional and unintentional emissions. A general shift to passive sensor suites may be the simplest near-term solution. However, superior situational awareness requires detection, discrimination and tracking of vast arrays of target classes
more » ... diverse sensing environments where active sensors may provide greater performance. From urban dismount identification to deep space collision avoidance, conventional active radars can deliver the high level of fidelity necessary for producing actionable imagery. The penalty is often an increase in the system's complexity, as well as the likelihood of radio frequency interference and interception. The AFIT noise network (NoNET) is an experimental multistatic ultrawideband random noise radar designed to produce highly accurate, highly resolved imagery of a target scene while maintaining a simple design and low probability of intercept posture. The research studies the radar node design and the feasibility in processing the bistatic channel information of a cluster of widely distributed noise radar nodes. A system characterization is used to predict theoretical localization performance metrics. Design and integration of a distributed and central signal and data processing architecture enables the Matlab Ⓡ -driven signal data acquisition, digital processing and multi-sensor image fusion. After design and integration is successfully accomplished, research objectives focus on assessing the target localization accuracy and resolution performance of first the monostatic system and then the multistatic system of systems. Experimental evaluation of the monostatic localization perforiv mance reveals its range measurement error standard deviation is 4.8 cm with a range resolution of 87.2(±5.9) cm. Finally, a joint coverage area within the AFIT RCS range allows single and multi-target scenarios for assessing the 16-channel multistatic solution. The average multistatic localization error is assessed as 7.7(±3.1) cm and a comparative analysis is performed against the netted monostatic solution. Results show that active sensing with a low probability of intercept (LPI) multistatic radar, like the AFIT NoNET, is not only feasible but capable of sub-meter accuracy and near meter-resolution in its 2-dimensional fused imagery products. v
doi:10.1109/radar.2011.5960699 fatcat:y2g5eaqjm5hxvpo4wwqkzq2wwe