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Multiplexing Antenna Arrays is the rapid development anti-interference key technology of 4G mobile communication. The core is the direction of pattern synthesis. Yet some of the algorithm has the problem of needing lots of data, slow speed of optimization and convergence accuracy. In this paper the improved antenna pattern synthesis based on particle swarm… (More)
Edge is the basic features of the image, including useful information used to identify images. Because the target edge, texture, background levels are likely to be the edge. It is difficult to find a universal algorithm for edge detection. This paper describes the existing edge detection techniques and methods. It proposed the improvement of first-order… (More)