Low-complexity peak-to-average power ratio reduction method for orthogonal frequency-division multiplexing communications
Low-complexity peak-to-average power ratio reduction method for orthogonal frequency-division multiplexing communications
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DOI：
10.1049/iet-com.2015.0194
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发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
Yuewen Wang;A. Akansu
中科院分区：
文献类型：
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作者：
Yuewen Wang;A. Akansu
发射信号的高峰均功率比（PAPR）是诸如正交频分复用OFDM的多载波传输的主要缺点。在文献中已经报道了过多的PAPR降低技术。一些技术修改原始符号字母表（SA）中的符号的相位和/或幅度，诸如选择的映射和部分发送序列技术。然而，此类方法的缺点是，由于需要多次快速傅里叶逆变换（IFFT）操作而导致计算负担沉重，以及由于边信息（SI）而导致误比特率性能下降。在这项研究中，提出了一个低复杂度的PAPR降低框架，共同修改的相位和幅度值的原始符号的字母表。该框架仅利用一个IFFT/FFT算子对来进行符号的复用转换，而没有任何SI。所提出的方法来设计一个SA修改器矩阵（SAM）的PAPR降低的优点是通过性能比较，在这项研究中提出的应用场景。
The high peak-to-average power ratio (PAPR) of the transmitted signal is a major drawback of multicarrier transmission such as orthogonal frequency-division multiplexing OFDM. A plethora of PAPR reduction techniques has been reported in the literature. Some of the techniques modify the phase and/or amplitude of symbols in the original symbol alphabet (SA) such as selected mapping and partial transmit sequences techniques. However, such methods have shortcomings of a heavy computational burden caused by required multiple inverse fast-Fourier transform (IFFT) operations and bit error rate performance degradation due to side information (SI). In this study, a low-complexity PAPR reduction framework is proposed to jointly modify phase and amplitude values of the original symbols in the alphabet. This framework utilises only one IFFT/FFT operator pair for transmultiplexing of symbols without any SI. The merit of the proposed method to design a SA modifier matrix (SAM) for PAPR reduction is shown through performance comparisons for the application scenarios presented in this study.