• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>31st AIAA international communications satellite systems conference >Halfband IIR Filter Alternatives for On-Board Digital Channelisation
【24h】

Halfband IIR Filter Alternatives for On-Board Digital Channelisation

机译：板载数字通道化的半带IIR滤波器替代方案

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

For on-board processors, digital filters are employed to perform various Digital Signal Processing (DSP) tasks especially during the channelisation process for demultiplexing the incoming channels as well as multiplexing for their re-transmission back to the ground. In this paper we will focus on the Half-Band (HB) filters, which are the choice on various filter bank approaches. Implementing a HB filter, the conventional choice is a Finite Impulse Response (FIR) filter due to its simple mathematical form and its ability to have a linear phase response which does not cause any phase distortion during its processing. However, in some cases (where some distortion in the phase is tolerated) Infinite Impulse Response (IIR) filters would also be a good choice to implement a HB filter due to lower complexity in its structure in comparison to an FIR filter. Our studies have shown that it is possible to obtain reductions of up to 35% both in terms of circuit area and power when FIR HB filters are replaced with their IIR counterparts with only a small distortion in the phase response in return without any compromise in the overall performance. In this paper we will talk about three alternatives for implementing a HB IIR filter, which are 1) Balanced Model Truncated (BMT) derived IIR 2) HB IIR using Lowpass-to-Lowpass Frequency Transformation (LLFT) and 3) HB almost-linear phase IIR. A comparative study on the estimated complexity and power dissipation of each approach will also be presented.
机译：对于板载处理器，数字滤波器用于执行各种数字信号处理（DSP）任务，尤其是在信道化过程中，用于对输入信道进行多路分解以及对其进行重新传输回地面的复用。在本文中，我们将重点介绍半带（HB）滤波器，它们是各种滤波器组方法的选择。实现HB滤波器后，常规选择是有限脉冲响应（FIR）滤波器，这是因为其简单的数学形式以及具有线性相位响应的能力，该线性相位响应不会在处理过程中引起任何相位失真。但是，在某些情况下（容忍相位中的某些失真），无限脉冲响应（IIR）滤波器也将是实现HB滤波器的好选择，因为与FIR滤波器相比，其结构复杂度较低。我们的研究表明，用FIR HB滤波器替换其IIR对应物时，在电路面积和功率方面都可以减少多达35％的信号，而相位响应只有很小的失真，反之，在整体表现。在本文中，我们将讨论实现HB IIR滤波器的三种选择，它们是：1）平衡模型截断（BMT）得出的IIR 2）使用低通到低通频率变换（LLFT）的HB IIR和3）HB几乎线性IIR阶段。还将对每种方法的估计复杂度和功耗进行比较研究。

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