CAJ | 학술논문

正交频分复用（OFDM）系统的主要缺点是发射机输出信号的高峰均功率比（PAPR）。选择性映射（SLM）法能有效地降低OFDM信号的PAPR概率，但它需要一组逆快速傅立叶变换（IFFT）来产生候选传输信号，这将导致高的计算复杂度。本文给出一种低复杂度的次优化SLM算法。仿真结果表明该次优化SLM算法在降低PAPR相似的情况下，具有更小的计算复杂度。
정교빈분복용（OFDM）계통적주요결점시발사궤수출신호적고봉균공솔비（PAPR）。선택성영사（SLM）법능유효지강저OFDM신호적PAPR개솔，단타수요일조역쾌속부립협변환（IFFT）래산생후선전수신호，저장도치고적계산복잡도。본문급출일충저복잡도적차우화SLM산법。방진결과표명해차우화SLM산법재강저PAPR상사적정황하，구유경소적계산복잡도。
Orthogonal frequency division multiplexing (OFDM) system is the main disadvantage of transmitter output signal of high peak to average power ratio (PA-PR).The selected mapping (SLM) approach provides good performance for PAPR reduction, but it requires a bank of inverse fast Fourier transforms (IFFTs) to generate a set of candidate transmission signals, and this requirement usually results in high computational complexity. In this paper, we propose a low-complexi-ty sub-optimal SLM algorithm. Computer simulation results show that the PAPR performance of the pro-posed SLM is closely similar to the original SLM, while it has low computational complexity.