結合部分傳輸序列技術與蒙地卡羅方法在正交分頻多工系統中降低峰均功率比值

A Modified PTS Scheme with Monte Carlo Method for PAPR Reduction in OFDM Systems

陳嘉舷(CHIA-HSUAN CHEN)

指導教授 ： 梁新潁

朝陽科技大學/資訊學院/資訊與通訊系/碩士(2018年)

摘要

本篇論文藉由蒙地卡羅方法（Monte Carlo method）與部分傳輸序列（Partial Transmit Sequence, PTS）二項技術來提出一種具有低運算量的降低峰均功率比值 (peak-to-average power ratio, PAPR)技術，並研究與分析它在正交分頻多工(orthogonal frequency division multiplexing, OFDM)系統的改善效能。蒙地卡羅方法是屬於計算演算法（computational algorithms）的重要分支之一，它主要是使用隨機方式來產生資料後，再進行多次的實驗以求得實驗的近似解。近年來，蒙地卡羅方法已然成為相當熱門的研究方法，並被廣泛應用於在各個研究領域之中。本篇論文將使用蒙地卡羅方法來改善部分傳輸序列技術所需的高運算量，並且提出兩種降低高運算量的方法，同時具有次佳的降低峰均功率比值之改善效能。最後在模擬結果顯示推薦方法在大幅改善部分傳輸技術的高運算量時，仍可擁有次佳化的峰均功率比值改善效能。

關鍵字

正交分頻多工 ； 峰均功率比值 ； 蒙地卡羅方法 ； 部分傳輸序列 ； 次佳化 ； 基於蒙地卡羅的部分傳輸序列技術

並列摘要

The peak-to-average power ratio (PAPR) reduction technique with low amount of computation is proposed by combining the Monte Carlo Method and the partial transmit sequence (PTS). Its performance improvement in the orthogonal frequency division multiplexing (OFDM) is studied and analyzed. The Monte Carlo method, an important branch of computational algorithms, produces an experimental approximate solution from multiple experiments after the input data are generated randomly. In this paper, the Monte Carlo method is used to improve the large quantity of computation required for the partial transmit sequence. The simulation results show that the proposed method has great improvement in the high computation quantity for the partial transmit sequence technique while keeping the suboptimal PAPR reduction performance.

並列關鍵字

OFDM ； PAPR ； Monte Carlo method ； PTS ； suboptimal ； MCPTS

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