首页> 外文学位 >FPGA wavelet transform implementation.
【24h】

FPGA wavelet transform implementation.

机译:FPGA小波变换实现。

获取原文
获取原文并翻译 | 示例

摘要

This thesis presents the theory, the design and the implementation of the octave-band and full tree wavelet transforms on a VLSI chip using VHDL that will minimize the surface usage of the chip. This reduction is possible due to the use of the idle periods of the unit to carry out the calculations of the higher levels as well as the use of the method known under the name of Lifting scheme, which makes it possible to reduce the complexity of the implementation of the complementary filters by 50% compared with the more traditional implementation using convolution.; The design process must consider the number of computation units, the input/output data rate and the storage space. The storage space must be independent of the input data length, since this might be very large. These criteria will affect the total area as well as the power consumption and maximum clock speed of the realization.; Some additional requirements for the DWT implementations should be considered. The architecture should be able to perform a signal reconstruction with only minor modifications. It might also be important to reconfigure the realization for the use of different filter coefficients and lengths.; All details of this implementation, especially the different design units, will be described. The results of a final simulation using a set of sample data will be discussed in terms of the processor's complexity and achievable precision. The achieved improvements will be demonstrated by comparing the results to a conventional FIR filter implementation. Further, possible extensions to the project will be given.
机译:本文介绍了使用VHDL在VLSI芯片上进行八度频带和全树小波变换的理论,设计和实现,这将最大限度地减少芯片的表面使用。这种减少是可能的,这是由于使用了设备的闲置时间来进行更高级别的计算,以及使用了以提升方案为名的已知方法,从而可以降低设备的复杂性。与使用卷积的更传统的实现相比,互补滤波器的实现减少了50%。设计过程必须考虑计算单元的数量,输入/输出数据速率和存储空间。存储空间必须与输入数据长度无关,因为这可能会很大。这些标准将影响总面积以及实现的功耗和最大时钟速度。应考虑DWT实现的一些其他要求。该体系结构应该仅需很小的修改就可以执行信号重建。重新配置实现以使用不同的滤波器系数和长度也可能很重要。将描述该实现的所有细节,尤其是不同的设计单元。将使用处理器的复杂性和可达到的精度来讨论使用一组样本数据进行最终仿真的结果。通过将结果与常规FIR滤波器实现方案进行比较,可以证明所取得的改进。此外,将给出对该项目的可能扩展。

著录项

  • 作者

    Mourad, Gaby.;

  • 作者单位

    Universite Laval (Canada).;

  • 授予单位 Universite Laval (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.Sc.
  • 年度 2004
  • 页码 131 p.
  • 总页数 131
  • 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

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