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 METHOD FOR REDUCING PEAK-TO-AVERAGE POWER RATIO OF MULITI-CARRIER MODULATION
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刊登日期：2014/05/21 |
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| ‧ 專利名稱 |
用於多載波調變通訊系統中降低其時域信號之峰均比之方法 |
| ‧ 專利證書號 |
I278202
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| ‧ 專利權人 |
國立臺灣大學 |
‧ 專利國家
(申請日) |
中華民國 (2004/12/15)
美國 (2005/07/19)
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| ‧ 發明人/PI |
林茂昭,鄧尚康,
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| ‧ 單位 |
電信工程學研究所
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| ‧ 簡歷/Experience |
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| 技術摘要 / Our Technology： |
本發明係一種用於多載波調變通信系統中降低其時域信號之峰均比之方法，該方法係利用已知之遞歸式剪除及過濾外溢頻譜法(recursive clipping and filtering)，以簡單而有效之方式，降低多載波調變通信系統(multi–carrier modulation)中之峰均比(peak to average power ratio)與外溢頻譜(out–of–band power spectrum)，再利用適當設計之失真限制法(bounded distortion)，將遞歸過程中經過剪除及過濾外溢頻譜之多載波信號，施予適當之失真限制，以在相加性白色高斯雜訊通道(additive white Gaussian noise channel)中，於高訊雜比(signal to noise ratio)之情況下，達成較低之錯誤率，並令錯誤地限(error floor)之現象近乎消除，如此，不僅可令後端之功率放大器操作在更高之平均輸出功率，也降低了功率放大器所需之線性操作範圍。
A method for reducing the peak-to-average power ratio of the time-domain signal in a communication system using multi-carrier modulation is provided herein. The present invention is based on the method of recursive clipping and filtering to reduce the peak-to-average power ratio and out-of-band spectrum, but during the recursive process, the distortion of the multi-carrier modulated signal is controlled to be bounded within a specific region. In an additive white Gaussian noise channel with high signal-to-noise ratio, the present invention could achieve significantly lower error rate and the error floor phenomenon is almost completely removed. Therefore the power amplifier could be operated at higher average output power and a smaller range of linearity.
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| 專利簡述 / Intellectual Properties： |
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聯繫方式 / Contact： |
| 臺大產學合作總中心 / Center of Industry-Academia Collaboration, NTU |
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| Email：ordiac@ntu.edu.tw |
電話/Tel：02-3366-9945 |
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