CAJ | 학술논문

LTE系统以OFDM技术为核心，但OFDM 技术自身存在高峰均比的问题。随着硬件技术的迅速发展，概率类技术被认为是最有希望解决 OFDM 系统峰均比 PAPR问题的一类方法。部分传输序列 PTS （Partial Transmit Sequence）技术作为概率类技术中的代表技术一直广受关注，其关键问题在于搜索到合适的相位因子序列，使OFDM信号的峰均比性能最好。本文将混合的模拟退火遗传算法SGA （Simulated Annealing Genetic Algorithm）应用于PTS技术中相位因子序列的搜索，并通过仿真验证其有效性及优越性。对于相同的峰均比阈值要求，SGA算法能更好地改善PTS技术搜索最优相位因子序列的复杂度问题，使其更易于实现。
LTE계통이OFDM기술위핵심，단OFDM 기술자신존재고봉균비적문제。수착경건기술적신속발전，개솔류기술피인위시최유희망해결 OFDM 계통봉균비 PAPR문제적일류방법。부분전수서렬 PTS （Partial Transmit Sequence）기술작위개솔류기술중적대표기술일직엄수관주，기관건문제재우수색도합괄적상위인자서렬，사OFDM신호적봉균비성능최호。본문장혼합적모의퇴화유전산법SGA （Simulated Annealing Genetic Algorithm）응용우PTS기술중상위인자서렬적수색，병통과방진험증기유효성급우월성。대우상동적봉균비역치요구，SGA산법능경호지개선PTS기술수색최우상위인자서렬적복잡도문제，사기경역우실현。
With the OFDM technology as the core ,the LTE system is regarded as the "Quasi 4G" technology . But the OFDM technology has its own problem of high PAPRs .Along with rapid development and mature of the hardware technology ,the probability techniques come out as the most promising way to solve the problem of PAPR restriction of OFDM .The PTS technique is representative of the probability techniques .The key problem of PTS is to search out the best phase factor sequence to decrease the PAPR .In this paper ,the hybrid simulated annealing genetic algorithm (SGA) was applied in searching of the best phase factor sequence .Simu-lation verified its effectiveness and superiority .For the same PAPR threshold requirements ,SGA can better improve the calculation complexity of PTS and achieve easier realization .