国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In this paper, dynamic spectrum access in complex wireless communication environment is studied, and a dynamic spectrum detection scheme based on HMM and state persistence is proposed. Specifically, on the basis of energy window detection, the proposed scheme first represents the signal energy of each primary user changing with time as a random process. Secondly, two detectors are designed to detect the differences between the primary and secondary users by using HMM and the concept of state persistence,and try to distinguish the signals according to their statistical characteristics, so as to improve the detection accuracy of available white spaces and their dynamic spectrum access ability. The simulation results show that the proposed scheme can not only distinguish transmission sources in complex wireless communication environment, but also improve the performance of dynamic spectrum detection.