A peak power reduction scheme based on reversal of parity-bits for a block-coded OFDM signal
A peak power reduction scheme based on reversal of parity-bits for a block-coded OFDM signal
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一种基于块编码 OFDM 信号奇偶校验位反转的峰值功率降低方案
DOI：
10.1109/vetecs.2004.1390606
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Y. Akaiwa
中科院分区：
文献类型：
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作者：
O. Muta;Y. Akaiwa
针对分组编码的OFDM信号，提出了一种基于奇偶比特倒置的峰值功率降低(PPR)方案。在我们的PPR方案中，码字的整个奇偶校验块是逐个符号地自适应反转的，以便最小化ofdm信号的峰均比。在接收端，通过检查接收到的码字的校正子并保护码字的有效位不受传输错误的影响，可以以足够的精度恢复原始码字。当使用(7，4)、(31，21)和(31，26)BCH码时，通过应用PPR方案，在指数衰减的6径瑞利衰落条件下获得与没有PPR的情况大致相同的BER性能的情况下，在10/sup-4/的CCDF(互补累积分布函数)处，可以分别将ofdm信号的PAPR降低约2.8、2.5和2.0db。
We propose a peak power reduction (PPR) scheme based on the reversal of parity-bits for a block-coded OFDM signal. In our PPR scheme, the entire parity-check block of the codeword is adaptively reversed, symbol-by-symbol, so as to minimize the PAPR of the OFDM-signal. At the receiver, the original codeword can be restored with sufficient accuracy by checking the syndrome of the received codeword and protecting a significant-bit of the codeword from transmission error. When (7,4), (31,21) and (31,26) BCH codes are employed, the PAPR of the OFDM signal, at the CCDF (complementary cumulative distribution function) of 10/sup -4/, can be reduced by about 2.8, 2.5 and 2.0 dB, respectively, by applying the PPR scheme while achieving approximately the same BER performance as the case without PPR in an exponentially decaying 6-path Rayleigh fading condition.
DOI：
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发表时间：
1999-12
期刊：
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影响因子：
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作者：
R. V. Nee;R. Prasad
通讯作者：
R. V. Nee;R. Prasad