...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Communications >Noncoherent Amplify-and-Forward Cooperative Networks: Robust Detection and Performance Analysis
【24h】

Noncoherent Amplify-and-Forward Cooperative Networks: Robust Detection and Performance Analysis

机译：非相干放大转发合作网络：稳健的检测和性能分析

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

We develop closed-form generalized likelihood ratio test (GLRT) sequence detectors for multi-relay amplify-and-forward (AF) cooperative networks employing M-ary differential phase-shift keying (M-DPSK) and noncoherent M-ary frequency-shift keying (M-FSK). The proposed detectors achieve robust performance in a wide range of fading environments where prior knowledge of channels, signal powers, noise variances, and relay functionalities is unavailable to the destination. A comprehensive error probability performance analysis is carried out in Rayleigh fading. Specifically, we derive unified pairwise error probability (PEP) expressions for both detectors in a dual-hop network, which are valid for arbitrary modulation order M and arbitrary sequence length N_s. We also derive unified bit-error probability (BEP) expressions for both detectors employing binary signalings in various networks for N_s=1. It is further shown that both detectors achieve near full diversity orders. Finally, the superiorities of the proposed detectors over the state-of-the-art noncoherent detectors are justified through extensive comparisons in practical scenarios. For example, in a multi-relay network where the relays are uniformly distributed between the source and destination, the proposed detector for noncoherent FSK with N_s=1 outperforms the well-known maximum energy selector by almost 15 dB in high signal-to-noise ratios.
机译：我们为采用M元差分相移键控（M-DPSK）和非相干M元频移的多中继放大转发（AF）协作网络开发封闭形式的广义似然比测试（GLRT）序列检测器键控（M-FSK）。所提出的检测器在各种衰落环境中均具有强大的性能，在衰落环境中，目的地无法获得有关信道，信号功率，噪声变化和中继功能的先验知识。在瑞利衰落中进行了综合错误概率性能分析。具体而言，我们导出了双跳网络中两个检测器的统一成对错误概率（PEP）表达式，它们对任意调制阶数M和任意序列长度N_s有效。我们还为N_s = 1的各种网络中采用二进制信令的两个检测器得出统一的误码概率（BEP）表达式。进一步表明，两个检测器均达到接近全分集的阶数。最后，通过在实际场景中进行广泛的比较，可以证明所提出的探测器优于最新的非相干探测器。例如，在中继器在源和目的地之间均匀分布的多中继网络中，建议的N_s = 1的非相干FSK检测器在高信噪比下比著名的最大能量选择器高出近15 dB。比率。

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