中山大学电子与通信工程系,广东,广州,510275
纸质出版:2001
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赵慧民, 张光昭, 余顺争. DMT中一种格型结构算法的DSP实现分析[J]. 电子学报, 2001,29(10):1342-1345.
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.
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(
N
=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.
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(
N
=256)
so it improves greatly ADSL reality and applicability.
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