Nakagami衰落信道下多跳合作分集系统的中断率

Outage Probability of Multihop Cooperative Diversity System over Nakagami Fading Channels

该文在Nakagami衰落信道下研究了多跳无线网络中合作分集系统的中断性能。根据单节点和多节点中继的情况导出了合作系统再生中继时中断率的数学闭式解,并在高平均信噪比下给出了系统的分集度。理论分析和仿真研究的结果表明多跳合作系统在一定条件下可实现全路由分集,其分集度为所有路由的分集度之和,不是所有合作节点的和,但每支路由的分集度取决于该路由两跳中较小的值。

This paper investigates the outage performance of the cooperative diversity systems for multi-hop wireless networks over Nakagami fading channels. Their dosed-form expressions of the regenerative outage probability are derived, and the diversity orders are achieved at high Average Signal-to-Noise Ratio （ASNR） in terms of the single relaying node case and multiple relaying nodes case. The theoretical analysis and simulation results show that the cooperative systems can offer the full-route diversity at some given manners, and their diversity order is the sum of the full route diversities, not the sum of all cooperative nodes, however, the diversity order of each route is determined by the smaller one between that of the two hops.