DATA TRANSMISSION BY FREQUENCY-DIVISION MULTIPLEXING USING DISCRETE FOURIER TRANSFORM
DATA TRANSMISSION BY FREQUENCY-DIVISION MULTIPLEXING USING DISCRETE FOURIER TRANSFORM
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DOI：
10.1109/tcom.1971.1090705
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发表时间：
1971-01-01
期刊：
影响因子：
--
通讯作者：
EBERT, PM
中科院分区：
文献类型：
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作者：
WEINSTEIN, SB;EBERT, PM
傅立叶变换数据通信系统是频分复用（FDM）的实现，其中离散傅立叶变换被计算为调制和解调过程的一部分。除了消除FDM系统中通常需要的副载波振荡器和相干解调器的堆之外，还可以围绕执行快速傅立叶变换的专用计算机来构建完全数字化的实现。在本文中，系统的描述和线性信道失真的影响进行了研究。信号设计标准和均衡算法推导和解释。提出了一种差分相位调制方案，避免了任何均衡。
The Fourier transform data communication system is a realization of frequency-division multiplexing (FDM) in which discrete Fourier transforms are computed as part of the modulation and demodulation processes. In addition to eliminating the bunks of subcarrier oscillators and coherent demodulators usually required in FDM systems, a completely digital implementation can be built around a special-purpose computer performing the fast Fourier transform. In this paper, the system is described and the effects of linear channel distortion are investigated. Signal design criteria and equalization algorithms are derived and explained. A differential phase modulation scheme is presented that obviates any equalization.