CAJ | 학술논문

为了得到部分传输序列降低OFDM信号峰均比方案中复杂度和性能之间的良好折衷,提出了一种基于格形结构的部分传输序列因子的搜索方法.这种格形搜索有一个可变的约束长度LC,1≤LC≤V-1,V为部分传输序列子块的数目.该方法通过搜寻格形结构中可能的路径来决定部分传输序列的因子,而这些路径通过改变LC个相邻因子的值得到.格形搜索可看作一个统一的传输序列因子搜索模型,当LC=V-1,为全局搜索;当LC=1,为单步迭代搜索.采用不同的约束长度,格形搜索在抑制峰均比方面呈现出不同的性能,LC 越大其性能越好,而LC=V-1对应最优的结果.同时较大的LC需要更多的计算.这些结论有助于在复杂度和性能之间找到一个好的折衷.
위료득도부분전수서렬강저OFDM신호봉균비방안중복잡도화성능지간적량호절충,제출료일충기우격형결구적부분전수서렬인자적수색방법.저충격형수색유일개가변적약속장도LC,1≤LC≤V-1,V위부분전수서열자괴적수목.해방법통과수심격형결구중가능적로경래결정부분전수서렬적인자,이저사로경통과개변LC개상린인자적치득도.격형수색가간작일개통일적전수서렬인자수색모형,당LC=V-1,위전국수색;당LC=1,위단보질대수색.채용불동적약속장도,격형수색재억제봉균비방면정현출불동적성능,LC 월대기성능월호,이LC=V-1대응최우적결과.동시교대적LC수요경다적계산.저사결론유조우재복잡도화성능지간조도일개호적절충.
To obtain good trade-offs between complexity and performance on peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) using partial transmitting sequence (PTS) schemes,a trellis structure based PTS factor search method is proposed.The trellis search is with a variant constraint length LC,1≤LC≤V-1,where V is the number of PTS subblocks.The method is to decide a PTS factor by searching all the possible paths obtained by varying LC consecutive factors.The trellis search can be viewed as a general PTS factor search model.If LC=V-1,it is a full search,and if LC=1,it is an iterative search.Using different constraint lengths,trellis factor search PTS exhibits different PAPR reduction performances.A larger LC results in a better performance and LC=V-1 results in the optimum.However,a larger LC requires more computation.This helps to choose a good trade-off between complexity and performance.