Opportunistic Digital Array Radar and its technical characteristic analysis

Based on the digital array radar (DAR), conformal array, sparse array, multi-input multi-output (MIMO) system and Ubiquitous radar, a new radar system-the Opportunistic digital array radar (ODAR) has been proposed in recent years. The concept, principle and characteristics of the ODAR are presented in this paper. Furthermore, the challenges are also analyzed from the aspects of the random element distributing, digital beam forming, signal transmission synchronization and adaptively intelligent decision, etc. The Genetic Arithmetic (GA) is exploited to carry out the beam shaping optimization of 3-D randomly distributed elements. The simulation results indicate that the method is feasible. The mathematics models of phase perturbation are preformed to implement the clock synchronization and adaptive beam steering. The adaptive synchronization design of signal transmission is adopted to improve the synchronization precision. The phase perturbation module is built to analyze the influence on ODAR specification by optical fibre or wireless links.