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A general framework for analyzing, characterizing, and implementing spectrally modulated, spectrally encoded signals.

机译：用于分析，表征和实现频谱调制的频谱编码信号的通用框架。

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摘要

Once a novelty enjoyed by few, wireless communication has quickly become a necessity for many in today's rapidly-paced mobile world. Future fourth generation (4G) communication systems aim to fuse cellular and internet capabilities into a single operating environment, efficiently providing universal, high-speed access for civilian and military communicators alike. One potential key to 4G implementation is software defined radio (SDR) technology, which enables adaptive signal generation This adaptivity inherently provides waveform diversity which may ultimately be controlled through cognitive radio (CR) principles, i.e., by actively monitoring channel conditions, traffic loads, spectrum availability, etc., while tailoring waveform features to improve overall efficiency. The synergistic union of SDR control via CR principles is called CR-based SDR. Although research is rapidly progressing in SDR hardware and software venues, current SDR research lacks the theoretical foundation and analytic framework to fuse these developments together to permit efficient development, characterization, and implementation.; This research addresses this deficiency by providing a general analytic framework for analyzing, characterizing, and implementing spectrally modulated, spectrally encoded (SMSE) signals within CR-based SDR architectures. Researchers agree that orthogonal frequency division multiplexing (OFDM) will be the bedrock modulation and multiplexing technique for 4G systems given it provides unique advantages for communicating in fading environments. In this work, OFDM-based signals are collectively classified as SMSE given that data modulation and encoding are both applied in the spectral domain. The proposed analytic framework, developed around six key waveform design variables, provides the desired analytic commonality and unification for a myriad of SMSE signals.; SMSE framework applicability and adaptivity are shown using specific waveform design variable instantiations to generate analytic expressions for seven candidate 4G signals. The resultant expressions are compared with published results and consistency established for all signals considered. Next, framework implementation is demonstrated via modeling and simulation to reinforce practical utility. It is shown that expected communication performance is maintained within various SMSE coexistence scenarios, i.e., scenarios containing multipath fading, multiple access interference, and partial band interference. Simulated bit error performance for various signals constructed within the unifying SMSE framework is shown to correlate well with theoretical predictions.
机译：一旦很少有人喜欢的新颖性，无线通信已迅速成为当今快速发展的移动世界中许多人的必需品。未来的第四代（4G）通信系统旨在将蜂窝和Internet功能融合到单个操作环境中，从而为民用和军用通信器提供高效，通用的高速访问。 4G实施的一个潜在关键是软件定义的无线电（SDR）技术，该技术可实现自适应信号生成。这种自适应性固有地提供了波形分集，该波形分集最终可通过认知无线电（CR）原理进行控制，即通过主动监视信道条件，流量负载，频谱可用性等，同时调整波形功能以提高整体效率。通过CR原理进行SDR控制的协同结合称为基于CR的SDR。尽管在SDR硬件和软件领域的研究正在迅速发展，但当前的SDR研究缺乏将这些发展融合在一起以进行有效开发，表征和实施的理论基础和分析框架。这项研究通过提供一个通用的分析框架来解决这一缺陷，该框架用于分析，表征和实现基于CR的SDR体系结构中的频谱调制，频谱编码（SMSE）信号。研究人员一致认为，正交频分复用（OFDM）将是4G系统的基石调制和复用技术，因为它为衰落环境中的通信提供了独特的优势。在这项工作中，假设将数据调制和编码都应用于频谱域，则将基于OFDM的信号归为SMSE。围绕六个关键波形设计变量开发的拟议分析框架，为无数SMSE信号提供了所需的分析通用性和统一性。使用特定的波形设计变量实例显示SMSE框架的适用性和适应性，以生成七个候选4G信号的解析表达式。将结果表达式与发布的结果进行比较，并为所有考虑的信号建立一致性。接下来，通过建模和仿真来演示框架实现，以增强实用性。结果表明，在各种SMSE共存方案中，即在包含多径衰落，多址干扰和部分频带干扰的方案中，可以维持预期的通信性能。示出了在统一SMSE框架内构造的各种信号的模拟误码性能与理论预测密切相关。

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  • 作者

    Roberts, Marcus L.;

  • 作者单位

    Air Force Institute of Technology.;

  • 授予单位 Air Force Institute of Technology.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 223 p.
  • 总页数 223
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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