PAPR Reduction of OFDM with Trellis Shaping based on p-Norm Minimization
PAPR Reduction of OFDM with Trellis Shaping based on p-Norm Minimization
复制标题
基于 p 范数最小化的网格整形降低 OFDM 的 PAPR
DOI：
10.1109/lwc.2019.2903247
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发表时间：
2019
影响因子：
6.3
通讯作者：
Ochiai Hideki
中科院分区：
文献类型：
--
作者：
Takizawa Shun;Ochiai Hideki
我们提出了一种新的网格整形（TS）指标，可以降低正交频分复用（OFDM）信号的峰均功率比（PAPR）。所提出的度量基于 OFDM 信号瞬时功率的 p 范数以及基于最大峰值功率的传统时域度量的推广。此外，我们证明了所提出的 p = 2 的度量等效于最小化发射符号自相关函数的平方旁瓣的传统频域（FD）方法。仿真结果表明，在 CCDF = 10-4 下评估的 PAPR 方面，使用具有优化范数的建议度量的 TS 分别比传统的最大峰值功率和 FD 方法高出 0.15 dB 和 0.95 dB。另一方面，就可实现的立方度量而言，FD 度量仍然表现最佳。
We propose a new metric for trellis shaping (TS) that reduces the peak-to-average power ratio (PAPR) of orthogonal frequency-division multiplexing (OFDM) signals. The proposed metric is based on the p-norm of the OFDM signal instantaneous power and generalization of the conventional timedomain metric based on the maximum peak power. Furthermore, we prove that the proposed metric with p = 2 is equivalent to the conventional frequency-domain (FD) approach that minimizes the squared sidelobe of the autocorrelation function of transmit symbols. Simulation results demonstrate that the TS using the proposed metric with the optimized norm outperforms the conventional maximum peak power and FD approaches by 0.15 dB and 0.95 dB, respectively, in terms of the PAPR evaluated at CCDF = 10-4. On the other hand, the FD metric still performs best in terms of the achievable cubic metric.