Orthogonal discrete frequency coding waveforms(DFCWs) is an ideal quasi-orthogonal waveform. This paper analyses the ambiguity function of DFCWs and the results indicate that the correlation characteristics of DFCWs have only relationship with the code length and coding order. Based on the theoretical analysis, we defined the cross-correlation energy as the cost function, and used the improved discrete particle swarmoptimization(DPSO) to optimize the order of DFCWs. The new signal can effectively restrain the cross-correlation level between the two DFCWs. Simulation results verify the effectiveness of the designed DFCWs.

To improve anti-ship missiles selection capability over the intended target of the ship formation, a method is presented to select intended target by utilizing the mutual locations and RCS information of the ship formation. Firstly, this method takes advantage of the hausdorff distance to match the optimum position of the point set which are respectively acquired by fire-control radar and terminal guidance radar. Then, the point sets common points are acquired by the bidirectional nearest neighbor rule. At last, the common points are further selected by utilizing the RCS information of the target. The composite metric distance method is presented by utilizing the targets RCS information and the formation information, and the selection probability of the intended target is analyzed. The simulation experiments show that this method is free from the influence of the dispersion error of the control end and the whole maneuver of the formation target, and its correct selection probability over the intended target is higher than the method which uses the formation information only.

One method which is based on model to settle the long development cycle of driver motor control software is adopted for Electric Vehicle (EV). It is to achieve Field Oriented Control algorithm (FOC) designing, model building, and microcontroller driver integration, task scheduling, code generation; Model simulation experiments are completed aiming at three kinds of running conditions such as a constant speed, accelerating, on load; finally, these running conditions are realized in EV and dynamometer platform. Simulation and experimental results show FOC has a well performance on speed regulating by comparing technical parameters with Chang An Ben Ben Mini, adopting the method also shorten the development cycle of motor control software.