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A novel high-throughput FFT architecture for wireless communication systems.

机译：一种用于无线通信系统的新颖的高吞吐量FFT架构。

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摘要

The design of the physical layer (PHY) of Long Term Evolution (LTE) standard is heavily influenced by the requirements for higher data transmission rate, greater spectral efficiency, and higher channel bandwidths. To fulfill these requirements, orthogonal frequency division multiplex (OFDM) was selected as the modulation scheme at the PHY layer. The discrete Fourier transform (DFT) and the inverse discrete Fourier transform (IDFT) are fundamental building blocks of an OFDM system.;Fast Fourier transform (FFT) is an efficient implementation of DFT. This thesis focuses on a novel high-throughput hardware architecture for FFT computation utilized in wireless communication systems, particularly in the LTE standard. We implement a fully-pipelined FFT architecture that requires fewer number of computations. Particularly, we discuss a novel approach to implement FFT using the combined Good-Thomas and Winograd algorithms. It is found that the combined Good-Thomas and Winograd FFT algorithms provides a significantly more efficient FFT solution for a wide range of applications. A detailed analysis and comparison between different FFT algorithms and potential architectures suitable for the requirements of the LTE standard is presented.;Theoretical results have been validated by the implementation of the proposed approach on a field-programmable gate array (FPGA). As demonstrated by the mathematical analysis, a significant reduction has been achieved in all the design parameters, such as computational delay and the number of arithmetic operations as compared to conventional FFT architectures currently used in various wireless communication standards. It is concluded that the proposed algorithm and its hardware architecture can be efficiently used as an enhanced alternative in the LTE wireless communication systems.
机译：长期演进（LTE）标准的物理层（PHY）的设计在很大程度上受到对更高数据传输速率，更高频谱效率和更高信道带宽的要求的影响。为了满足这些要求，在PHY层选择了正交频分复用（OFDM）作为调制方案。离散傅里叶变换（DFT）和逆离散傅里叶变换（IDFT）是OFDM系统的基本构件。快速傅里叶变换（FFT）是DFT的一种有效实现。本文着眼于一种新颖的高吞吐量硬件架构，用于无线通信系统（尤其是LTE标准）中的FFT计算。我们实现了需要较少计算量的全流水线FFT架构。特别是，我们讨论了一种结合Good-Thomas和Winograd算法实现FFT的新颖方法。结果发现，Good-Thomas和Winograd FFT算法相结合，为广泛的应用提供了效率更高的FFT解决方案。提出了适合LTE标准要求的不同FFT算法和潜在架构之间的详细分析和比较。;通过在现场可编程门阵列（FPGA）上实施该方法，验证了理论结果。正如数学分析所证明的，与当前在各种无线通信标准中使用的常规FFT架构相比，所有设计参数（例如计算延迟和算术运算的数量）已大大减少。结论是，所提出的算法及其硬件架构可以有效地用作LTE无线通信系统中的增强替代方案。

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  • 作者

    Bhagat, Nikhilesh Vinayak.;

  • 作者单位

    San Diego State University.;

  • 授予单位 San Diego State University.;
  • 学科 Electrical engineering.;Mathematics.
  • 学位 M.S.
  • 年度 2016
  • 页码 84 p.
  • 总页数 84
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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