The DSP Implementation and Analysis of the Lattice Architecture Algorithm In DMT

ZHAO Hui-min; ZHANG Guang-zhao; YU Shun-zheng

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The DSP Implementation and Analysis of the Lattice Architecture Algorithm In DMT

更新时间：2025-07-16

- The DSP Implementation and Analysis of the Lattice Architecture Algorithm In DMT
- Acta Electronica Sinica Vol. 29, Issue 10, Pages: 1342-1345(2001)
- 作者机构：
  
  中山大学电子与通信工程系,广东,广州,510275
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.72
- Published：2001
- 稿件说明：
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ZHAO Hui-min, ZHANG Guang-zhao, YU Shun-zheng. The DSP Implementation and Analysis of the Lattice Architecture Algorithm In DMT[J]. Acta Electronica Sinica, 2001, 29(10): 1342-1345.
DOI：

ZHAO Hui-min, ZHANG Guang-zhao, YU Shun-zheng. The DSP Implementation and Analysis of the Lattice Architecture Algorithm In DMT[J]. Acta Electronica Sinica, 2001, 29(10): 1342-1345. DOI：

摘要

DMT(离散多音频)调制/解调是ADSL(不对称数字用户线)应用的标准传输技术.尽管DMT能达到比其它调制技术更高的速率

但其计算的复杂性也非常高

尤其是调制/解调核心程序FFT/IFFT的运算.因此

本文探索了一种特别适合DSP处理的时间递归(time-recursive)格型FFT/IFFT算法结构.该结构与其直接运算(

=256)相比仅需原来11%的乘法运算量和9%的加法运算量

从而使ADSL实时性、应用性大大提高.

Abstract

The discrete multitone (DMT) modulation/demodulation is the standard transmission technique in the application of asymmetric digital subscriber lines (ADSL).Although the DMT can achieve higher data rate compared with other modulation/demodulation schemes

its computational complexity is too high

especially to compute the modulation/demodulation kernel FFT/IFFT.Hence

a lattice algorithm based on the time-recursive approach is presented

which is very suitable to run in programmable DSP.The algorithm requires only 11% number of multipliers and 9% number of adders compared with the direct implementation(

=256)

so it improves greatly ADSL reality and applicability.

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