Interference-limited opportunistic relaying with reactive sensing
Interference-limited opportunistic relaying with reactive sensing
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DOI：
10.1109/twc.2010.01.081128
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发表时间：
2010
影响因子：
10.4
通讯作者：
A. Bletsas;A. Dimitriou;J. Sahalos
中科院分区：
文献类型：
--
作者：
A. Bletsas;A. Dimitriou;J. Sahalos
这项工作评估了在存在热噪声和干扰的情况下的机会中继，当通道感应被反应性地进行时，在缓慢衰落的环境中。所研究的场景采用单一网关，该网关提供对具有弱链路的多个目的地的访问，并利用中间中继网络。与现有技术形成鲜明对比的是，不假设中继间信道状态信息或通信，不需要网络编码，同时在每个目的地使用低复杂度的接收器。研究表明，即使在存在干扰的情况下，信息也可以无延迟地传递，同时收获合作多样性的好处。参与的继电器需要提供通往源和目的地的强大路径，同时它们之间尽可能地“隔离”。从这个角度来看，中继“有用性”的概念在噪声和干扰限制的环境中被重新定义，在机会中继下。
This work evaluates opportunistic relaying in the presence of thermal noise as well as interference, when channel sensing is conducted reactively, in slow fading environments. The studied scenario employs a single gateway that provides access towards several destinations with weak links and exploits a network of intermediate relays. In sharp contrast to prior art, no inter-relay channel state information or communication is assumed, no network coding is needed, while low-complexity receivers at each destination are employed. It is shown that information can be relayed without delay, while harvesting benefits of cooperative diversity, even at the presence of interference. The participating relays are required to offer strong paths towards source and destination, while at the same time they are as "isolated" as possible from each other. From that perspective, the notion of relay "usefulness" is redefined in both noise and interference-limited environments, under opportunistic relaying.