A novel trellis-shaping design with both peak and average power reduction for OFDM systems
A novel trellis-shaping design with both peak and average power reduction for OFDM systems
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DOI：
10.1109/tcomm.2004.836593
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发表时间：
2004-11
影响因子：
8.3
通讯作者：
H. Ochiai
中科院分区：
文献类型：
--
作者：
H. Ochiai
为了降低限带正交频分复用（OFDM）信号的峰均功率比，提出了一种新的栅格整形设计。该方法基于OFDM数据序列的自相关副瓣的递归最小化。结合维特比算法设计了一种新的度量。栅格整形的性能取决于信号映射策略，并提出了两种类型的映射，即Type-I和Type-II。Type-I映射不能降低平均功率，但可以显著降低峰值-平均功率比。另一方面，ii型映射的设计是为了实现峰值和平均功率的降低。在仿真的基础上，对系统在AWGN信道上的误码概率进行了评估，验证了该方案的有效性。
A new trellis shaping design is proposed for reducing the peak-to-average power ratio of the bandlimited orthogonal frequency-division multiplexing (OFDM) signals. The approach is based on recursive minimization of the autocorrelation sidelobes of an OFDM data sequence. A novel metric in conjunction with the Viterbi algorithm is devised. The performance of the trellis shaping depends on signal mapping strategy, and the two types of mapping, referred to as Type-I and Type-II, are proposed. The Type-I mapping has no capability of reducing the average power, but it can achieve a significant reduction of the peak-to-average power ratio. On the other hand, the Type-II mapping is designed to achieve both peak and average power reduction. The bit error probability of the system over an AWGN channel is evaluated based on the simulations, which confirms the effectiveness of the proposed scheme.