Mobile-to-Mobile地面通信信道统计模型分析

介绍了一种适用于分析城市和郊区移动对移动地面通信信道的统计模型.在分析该模型的基础上,对接收信号包络和相位的概率分布、空时相关函数和复包络的功率谱密度进行了研究.

Modeling and realization of mobile-to-mobile wideband MIMO channels based on the geometrical multi-ring and multi-ellipse stochastic scattering model

A geometry-based stochastic scattering model （GBSSM） based on geometrical multiple rings and ellipses is proposed for wideband multiple-input multiple-output （MIMO） mobile-to-mobile （M2M） fading channels. The proposed GBSSM is deployed with cross-polarized antennas and can be applied for the line-of-sight （LOS） and non- LOS （NLOS） scenarios by considering the single-bounced （SB） and double-bounced （DB） components. The channel realization is much more straightforward and concise to study the channel characteristics compared with the too complicated analytical solutions available so far. Based on the proposed GBSSM and realized channel, the channel characteristics and parameters at 2 GHz and 5 GHz with 100 MHz bandwidth are further investigated. The results can be used in the link and system level simulations in M2M radio systems.

移动自组网AOMDV协议应对衰落改进方案

在移动自组网中,信道条件直接决定了数据包传输的可靠性。为有效应对信道衰落,提出一种基于信道状态、可实时监控链路的路由方案来改进AOMDV协议。该方案在路由寻找过程中,以信道平均无衰时间(ANFD)作为路由度量来选择稳定的链路,并采用一种根据信道状态信息抢先切换的策略来维护连接的可靠性。仿真结果表明,通过该改进方案,AOMDV协议在网络吞吐量、平均端到端时延、路由控制开销和数据包投递率等性能上均有改善。