衰落信道下多载波系统的频域发射功率自适应

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI:10.1109/PIMRC.2001.965500

Jiho Jang, K. Lee, Yong-Hwan Lee

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引用次数: 17

摘要

多载波系统对无线信道中的多径衰落具有鲁棒性，是未来高数据速率传输的研究方向。为了使多载波系统的信道容量最大化，我们提出了一种同时考虑频域和时域的最优发射功率自适应方法。发现在平均发射功率约束下，最优发射功率自适应策略在频域上为“注水”策略。采用频域发射功率自适应的信道容量比仅采用频域发射功率自适应的信道容量大。

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Frequency-time domain transmit power adaptation for a multicarrier system in fading channels

A multicarrier system, which is under consideration for high data rate transmission in the future, offers robustness to multipath fading in a wireless channel. We develop the optimal transmit power adaptation method to maximize the channel capacity of a multicarrier system, considering both frequency and time domains. The optimal transmit power adaptation policy with average transmit power constraint is found to be "water-pouring" in the frequency-time domain. We also show that the channel capacity with the frequency-time domain transmit power adaptation is greater than that with only the frequency domain transmit power adaptation.

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12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)

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