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OFDM技术及降低其峰均功率比的二种有效的方法
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【电子毕业论文格式】OFDM技术及降低其峰均功率比的二种有效的方法The Techniques and an Efficient PAPR Reduced Method of OFDM Systems
摘要:OFDM是一种多载波调制技术,其特的这调制特性决定了它有较高的峰均功率比高峰均功率比信号会对实际放大器提出很高的线性要求,因此,它是限制OFDM技术实用化的主要障碍.目前虽有很多降低OFDM信号的峰均功率比PAPR的方案,但大多是以增加系统的复杂程度为代价的.本文提出了两种降低OFDM信号PAPR的方法,可以在不过分增加系统复杂性的基础上使其PAPR在很大程度上得到降低.
关键词:OFDM(正交频分复用):多径效应;峰均功率比(PAPR);随机相位校正;功率差异
Abstract: OFDM,a kind of Multi-carrier modulating techniques,holds a high PAPR(Peak-to-Average-Power Ratio)due to its special modulating characteristics.High PAPR signal limits this technique to be applied in practice because the strict linearity to the power amplifier is required by it .Tough, many schemes presented to reduce the PAPR,most of them are at the cost of increasing the systems’complexity .By the method of PAPR reduced for OFDM is presented in this thesis,the PAPR,can be lowered to some degree without excessively increasi
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