Multihop diversity in wireless relaying channels
Multihop diversity in wireless relaying channels
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DOI：
10.1109/tcomm.2004.836447
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发表时间：
2004-11
影响因子：
8.3
通讯作者：
J. Boyer;D. Falconer;H. Yanikomeroglu
中科院分区：
文献类型：
--
作者：
J. Boyer;D. Falconer;H. Yanikomeroglu
本文对多跳无线通信信道的物理层进行了理论描述和分析。四个信道模型被认为是和开发：解码中继多跳信道;放大中继多跳信道;解码中继多跳分集信道;和放大中继多跳分集信道。两个分类进行了讨论：解码中继与放大中继，多跳信道与多跳分集信道。信道模型进行比较，通过分析和仿真，与“单跳”（直接传输）参考信道的信噪比，中断的概率，错误的概率，和最佳功率分配的基础上。四个信道模型中的每一个被示出为在智能地选择中间中继终端的集合的条件下优于单跳参考信道。多跳分集信道的性能优于多跳信道。放大中继显示优于解码中继，尽管噪声传播。这是由于放大中继不受错误传播的影响，而错误传播将解码中继信道的性能限制在其最弱链路的性能。
This paper presents theoretical characterizations and analysis for the physical layer of multihop wireless communications channels. Four channel models are considered and developed: the decoded relaying multihop channel; the amplified relaying multihop channel; the decoded relaying multihop diversity channel; and the amplified relaying multihop diversity channel. Two classifications are discussed: decoded relaying versus amplified relaying, and multihop channels versus multihop diversity channels. The channel models are compared, through analysis and simulations, with the "singlehop" (direct transmission) reference channel on the basis of signal-to-noise ratio, probability of outage, probability of error, and optimal power allocation. Each of the four channel models is shown to outperform the singlehop reference channel under the condition that the set of intermediate relaying terminals is selected intelligently. Multihop diversity channels are shown to outperform multihop channels. Amplified relaying is shown to outperform decoded relaying despite noise propagation. This is attributed to the fact that amplified relaying does not suffer from the error propagation which limits the performance of decoded relaying channels to that of their weakest link.