频率选择性衰落信道的多载波调制方案

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI:10.1109/ICUPC.1998.733647

G. Wetzker, M. Dukek, H. Ernst, F. Jondral

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引用次数: 6

摘要

比较了采用差分(DPSK-OFDM)、相干(PSK-OFDM)数据调制和多载波码分多址(MC-CDMA)的正交频分复用(OFDM)调制方案在时变和时不变多径信道中的性能。忽略CDMA的缺点，MC-CDMA可以看作是一种新的调制技术。虽然相干OFDM和MC-CDMA需要信道均衡，但差分OFDM可以不需要信道均衡。作为一种信道均衡方法，提出了一种新的可控均衡方案，并进行了仿真研究。具有控制均衡的MC-CDMA是最适合时变和时不变选频信道的多载波调制原理。

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Multi-carrier modulation schemes for frequency-selective fading channels

The performance of orthogonal frequency division multiplexing (OFDM) modulation schemes using differential (DPSK-OFDM), coherent (PSK-OFDM) data modulation and multi-carrier code division multiple access (MC-CDMA) are compared for time-variant and time-invariant multipath channels. Ignoring the CDMA aspect, MC-CDMA can be viewed as a novel modulation technique. While coherent OFDM and MC-CDMA require channel equalization, differential OFDM can work without it. As a channel equalization method a new controlled equalization scheme is introduced and investigated by simulations. MC-CDMA with controlled equalization is shown to be the most suited multi-carrier modulation principle over time-variant and time-invariant frequency-selective channels.

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ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)

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