摘要:
受干扰、衰落、多径、路径损耗和阴影等因素制约，当移动Ad-hoc网络中两个节点间的距离较远时，两者间通过单跳方式无法保证高质量的可靠通信。若在该网络中通过节点分簇建立多跳虚拟天线阵列，实现协同分集，就可以有效应对上述不利影响。本文从静态和动态两个方面，在研究了基于信噪比和基于维特比算法分簇方案的基础上，进一步探讨了动态分簇对利用编码存储互信息的需求，详细分析了分簇方案的特性，并依据现阶段分簇技术在理论和实践两方面取得的主要成果及二者之间的本质联系，对未来的研究和探索提出了建议。
Abstract: The extremely poor performance owns to interference, attenuation, multi-path, path loss and shadowing. It makes it impossible to guarantee the quality and the reliability of the single hop communication between two nodes with long distance in mobile Ad-hoc network. The cooperative diversity could be achieved to counterbalance the above affects, once the multi-hop virtual mul-ti-antenna system was implemented with the aid of clustering the nodes. In terms of the static and dynamic clustering, this paper analyzed the characteristics of clustering schemes, according to the exploration of the mutual information accumulation with the aid of distributed space-time coding for dynamic clustering, in the light of the investigation of clustering schemes based on signal to noise ratio and Viterbi algorithm. On the basis of current achievement on theory and practice of clustering techniques and their essential relation, the proposals for future research and develop-ment were presented.