数据扩展OFDM的自适应调制研究

International Symposium on Power Line Communications and Its Applications, 2005. Pub Date : 2005-04-06 DOI:10.1109/ISPLC.2005.1430463

H. Ishikawa, M. Fujii, M. Itami, K. Itoh

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引用次数: 1

摘要

OFDM传输中的自适应子载波调制是一种提高传输速率的有效方案，因为OFDM可以根据每个子载波的信道状态信息独立地确定调制方案。然而，在这种情况下，需要从发送端向接收端传输调制分配信息，这会导致性能下降。本文提出了一种OFDM自适应调制方案，可以减少发送端到接收端的信息传输，实现信息分配。此外，为了进一步提高性能，还结合了子载波功率控制。理论分析和仿真结果表明，该方案具有较好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A study on adaptive modulation of data spread OFDM

An adaptive sub-carrier modulation in OFDM transmission is an effective scheme in order to increase transmission rate because it is possible for OFDM to determine a modulation scheme of each sub-carrier independently according to its channel state information. However, in this case, it is necessary to transmit allocation information of modulation from the transmitter to the receiver and this leads to degradation of performance. In this paper, an adaptive modulation scheme for OFDM that makes possible less information transmission from the transmitter to the receiver for allocation information is proposed. Moreover, sub-carrier power control is combined in order to improve performance further. As the result of theoretical analysis and simulation, better performance of the proposed scheme was confirmed.

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International Symposium on Power Line Communications and Its Applications, 2005.

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