...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Wireless personal communications: An Internaional Journal >Impact of the External Co-channel Interferences Over Multiuser Bi-directional Wireless Relaying Networks-Part I: System Description and Outage Analysis
【24h】

Impact of the External Co-channel Interferences Over Multiuser Bi-directional Wireless Relaying Networks-Part I: System Description and Outage Analysis

机译：外部同频道干扰对多用户双向无线中继网络的影响-第一部分：系统描述和中断分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper investigates the impact of co-channel interferences (CCIs) caused by the external terminals over multiuser bi-directional amplify-and-forward (AF) relaying. The investigation considers multiuser pair and single bi-directional AF based relay and finite numbers of external interference terminals in the system model. Simultaneous transmission model, which is default mode, creates CCIs that is caused by the other user-pairs (internal terminals) in the system model. The opportunistic source-pair selection (OSPS) strategy achieves near-optimal solution for the internal CCIs challenge and also achieves diversity order in high SNR regimes. However, external terminals' CCIs are inevitable and degrades the system performance. The main aim of this paper is to clearly state the impacts of external CCIs both for simultaneous and OSPS methods. According to the simulation results, in the case that the external terminals' transmit powers are identical and non-identical to each other, and if the external terminals' transmit powers are proportional with SNR, this results on the degradation of the achievable diversity order from N to 0 while also affecting the coding gain. The results also show that, when the external terminals have fixed transmit power values rather than proportional with SNR, in this circumstance, external terminals interference does not affect the achievable diversity order but it affects the system coding gain.The results also show that, when the number of external terminals which affect the user-pairs and relay terminals increase, for both identical and non-identical cases, the losses at the system coding gain exponentially decay. On the other hand, if the external terminals have non-identical transmit powers and if the relay terminal is interfered with more transmit power in comparison with what interferes with the user-pairs, this gives better performance values.
机译：本文研究了外部终端在多用户双向放大转发（AF）中继上引起的同信道干扰（CCI）的影响。调查考虑了系统模型中基于多用户对和单个双向AF的中继以及有限数量的外部干扰终端。同步传输模型是默认模式，它创建由系统模型中其他用户对（内部终端）引起的CCI。机会源对选择（OSPS）策略为内部CCI挑战实现了近乎最佳的解决方案，并在高SNR方案中实现了分集阶数。但是，外部终端的CCI是不可避免的，并且会降低系统性能。本文的主要目的是清楚地说明外部CCI对同时方法和OSPS方法的影响。根据仿真结果，在外部终端的发射功率相同且彼此不同的情况下，并且如果外部终端的发射功率与SNR成正比，则会导致可实现的分集阶数从N到0的同时也会影响编码增益。结果还表明，当外部终端具有固定的发射功率值而不与SNR成比例时，在这种情况下，外部终端干扰不会影响可达到的分集阶数，但会影响系统编码增益。在相同和不相同的情况下，影响用户对和中继终端的外部终端的数量都会增加，系统编码增益的损耗呈指数下降。另一方面，如果外部终端具有不相同的发射功率，并且与干扰用户对的中继终端相比，如果中继终端受到更大的发射功率的干扰，则这将提供更好的性能值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号