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Investigation of dynamic spectrum assignment schemes for cognitive wireless networks and reduced complexity equalization techniques in aeronautical telemetry channels.

机译：用于认知无线网络的动态频谱分配方案和航空遥测信道中降低复杂度的均衡技术的研究。

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摘要

This thesis spans across two different research areas in the field of communications. The first part deals with dynamic spectrum assignment policies for the secondary users in cognitive wireless networks and second part shows how reduced complexity Viterbi decoders can be utilized to combat frequency selective fading in aeronautical telemetry channels.;In a cognitive wireless network, sudden arrival of a primary user could force one or more secondary users to terminate their ongoing communication. We demonstrate that depending on the network condition, the proposed spectrum assignment scheme is capable of reducing dropping probability by a factor of 6 -- 7 compared to the conventional network.;High data rate communication between airborne vehicles and ground stations over a multipath channel necessitates equalization at the receiver to remove the detrimental effects of frequency selective fading. It is shown that equalization based on reduced complexity Viterbi decoders outperforms the existing linear equalizers followed by symbol-by-symbol detectors.
机译：本论文横跨通信领域的两个不同研究领域。第一部分处理认知无线网络中次级用户的动态频谱分配策略，第二部分显示如何利用降低的复杂性的维特比解码器来对抗航空遥测信道中的频率选择性衰落。主要用户可以强迫一个或多个次要用户终止其正在进行的通信。我们证明，根据网络条件，与常规网络相比，提出的频谱分配方案能够将下降概率降低6-7倍;机载车辆与地面站之间通过多径信道进行高数据速率通信是必需的在接收机处进行均衡，以消除频率选择性衰落的不利影响。结果表明，基于降低的复杂度的维特比解码器的均衡性能优于现有的线性均衡器，其次是逐符号检测器。

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  • 作者

    Kannappa, Sandeep Mavuduru.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2010
  • 页码 76 p.
  • 总页数 76
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

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