A set (e.g. an image) is called "fractal" if it displays self-similarity: it can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole. A possible characterisation of a fractal set is provided by the "box-

用matlab实现DF MIMO双跳系统模型的容量仿真，并实现了蒙特卡罗仿真，对研究DF、MIMO有很好的参考价值.-Using matlab to achieve DF MIMO capacity of dual-hop system model simulation, and implemented Monte Carlo simulation, the study of DF, MIMO have a good reference value.