动态频谱接入综述

动态频谱户在授权的频谱带宽中获得丰富频谱空隙。DSA技术可以缓解频谱短缺问题并且提高频谱利用率。文中讨论了DSA所面临的挑战,旨在揭示其未来的走向。介绍了前沿的频谱感知和频谱分享。调查了阻碍DSA成为主要的商业部署的挑战。为了应对这些挑战,建立了一个新的DSA模型,在这种模式下,授权的用户可以在DSA中相互合作,而且可以获得更加灵活的频谱共享。

Review of Dynamic Spectrum Access

Dynamic spectrum access is a new spectrum sharing model that allows secondary users to access the rich spectrum holes in the authorized spectrum bandwidth.DSA technology can alleviate shortage of spectrum problem and improve spectrum efficiency.In this article,we discuss the challenges that DSA faces and point to its direction in the future.Firstly,we give an introduction to the latest spectrum sensing and spectrum sharing.Then we investigate the challenges that prevent DSA from major commercial deployment.We believe that,facing these challenges,a new DSA model is essential,in which it is possible for the authorized users to cooperate in DSA and get more flexible spectrum sharing.