基于选择性分集技术的无线中继系统性能
Performance of Wireless Relaying System Based on Selection Diversity Techniques
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摘要: 采用中继传输能够抵抗无线信道的多径衰落,克服阴影效应,从而增强通信质量,提高频谱效率。该文首先给出了两跳中继系统模型,针对非再生及再生两类中继方式,简要介绍了采用非分集接收及最大比合并时的链路性能。考虑到接收机复杂度和系统实现的性能代价比,该文引入了处理相对简单但又具备分集优势的选择性合并方式,并根据中继节点不同的位置分布,分析了两类中继方式下系统的通信中断概率和误码率。数值结果表明,非再生中继传输具有较好的性能,同时中继系统若采用选择性分集接收,则既能降低收端复杂度,又能获得较大的性能增益。
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关键词:
- 中继传输;非再生;再生;分集
Abstract: Cooperative relaying can combat multi-path fading and shadowing effect in wireless networks to enhance communication quality and bandwidth efficiency. A two-hop relaying system model is provided in this paper, and the analytical evaluations of non-regenerative and regenerative relaying system with non-diversity or maximal ratio combining are introduced. Considering the complexity and cost-effectiveness of the receiver, this paper investigates the performance of the selection diversity in terms of probability of outage and error with different positions of relays. The numerical results show that non-regenerative relaying system outperforms the others, and selection diversity is a cost-effective method to improve system performance. -
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