CAJ | 학술논문

针对正交频分复用(OFDM)系统在多个子载波信号叠加输出时,容易出现高峰值平均功率比的问题.研究了系统中出现过高峰均功率比的原因,并对现有两种概率类抑制峰均功率比技术进行了相关仿真比较.提出了一种基于部分传输序列技术的抑制PAPR重复搜索算法.该方法采用重复分块搜索方法,对最优的相位序列进行二次搜索.仿真结果证明,与传统PTS算法相比较,改进算法能够在搜索复杂度较低的情况下,获得良好的峰值平均功率比降低性能.
침대정교빈분복용(OFDM)계통재다개자재파신호첩가수출시,용역출현고봉치평균공솔비적문제.연구료계통중출현과고봉균공솔비적원인,병대현유량충개솔류억제봉균공솔비기술진행료상관방진비교.제출료일충기우부분전수서렬기술적억제PAPR중복수색산법.해방법채용중복분괴수색방법,대최우적상위서렬진행이차수색.방진결과증명,여전통PTS산법상비교,개진산법능구재수색복잡도교저적정황하,획득량호적봉치평균공솔비강저성능.
Orthogonal Frequency Division Multiplexing(OFDM)systems are prone to the problem of high Peak to Average Power Ratio(PAPR)when the plurality of sub-carrier signal is superimposed onto output. Aiming at this problem, this paper studies the reason of the problem of Peak to Average Power Ratio in the system, compares the existing two probability suppressing the peak to average power ratio technology by simulation method and proposes a new duplicate search algorithm based on Partial Transmit Sequence(PTS)technique for PAPR reduction. The method uses a repeating block search method for a second search of the optimal phase sequence. Simulation results show that the algorithm can achieve good PAPR reduction with low computa-tional complexity.