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arXiv 1111.7078cs.ITmath.IT
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双向中继信道中基于差分调制的中继选择和模拟网络编码联合算法

Joint Relay Selection and Analog Network Coding using Differential Modulation in Two-Way Relay Channels

Lingyang Song, Hong Guo, Bingli Jiao, Merouane Debbah

摘要:

在本文中,我们考虑了一个一般的双向中继网络的两个源和N个中继时,源节点和中继都不知道的信道状态信息(CSI)。提出了一种基于差分调制的中继选择和模拟网络编码联合算法(RS-ANC-DM)。在该方案中,两个源采用差分调制,并将差分调制符号同时发送到所有中继。在中继接收的信号是两个传输符号的叠加,我们称之为模拟网络编码符号。然后,从N个中继器中选择具有最小和SER的单个中继器,以将ANC信号转发到两个源。为了便于选择过程中,在本文中,我们还提出了一个简单的次优最小最大标准的中继选择,其中一个单一的中继,最大限度地减少了两个源节点的SER。仿真结果表明,Min-Max选择算法与最优选择算法性能相当,但算法简单得多。分析了该方案的性能,并推导出一个简单的渐近SER表达式。通过仿真验证了分析结果。

英文摘要:

In this paper, we consider a general bi-directional relay network with two sources and N relays when neither the source nodes nor the relays know the channel state information (CSI). A joint relay selection and analog network coding using differential modulation (RS-ANC-DM) is proposed. In the proposed scheme, the two sources employ differential modulations and transmit the differential modulated symbols to all relays at the same time. The signals received at the relay is a superposition of two transmitted symbols, which we call the analog network coded symbols. Then a single relay which has minimum sum SER is selected out of N relays to forward the ANC signals to both sources. To facilitate the selection process, in this paper we also propose a simple sub-optimal Min-Max criterion for relay selection, where a single relay which minimizes the maximum SER of two source nodes is selected. Simulation results show that the proposed Min-Max selection has almost the same performance as the optimal selection, but is much simpler. The performance of the proposed RS-ANC-DM scheme is analyzed, and a simple asymptotic SER expression is derived. The analytical results are verified through simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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