CAJ | 학술논문

提出了一种在正交频分复用系统中循环前缀频域序列(CPFS)用于最小二乘信道估计的子载波构造方法.该构造方法基于比较CPFS 序列和梳状子载波序列的相关性,可使LS 信道估计的精度增加.该相关性利用凸优化的方法,以子载波总体为变量及LS信道估计的最小均方误差(MSE)机制建立约束,得到优化模型并通过拉格朗日方法求得最终构造解.仿真结果表明,该构造方法得出子载波新解能使得LS估计模型下,CPFS序列的估计精度更优.
제출료일충재정교빈분복용계통중순배전철빈역서렬(CPFS)용우최소이승신도고계적자재파구조방법.해구조방법기우비교CPFS 서렬화소상자재파서렬적상관성,가사LS 신도고계적정도증가.해상관성이용철우화적방법,이자재파총체위변량급LS신도고계적최소균방오차(MSE)궤제건립약속,득도우화모형병통과랍격랑일방법구득최종구조해.방진결과표명,해구조방법득출자재파신해능사득LS고계모형하,CPFS서렬적고계정도경우.
@@@@A restructuring method for least square (LS) channel estimation using cyclic-prefix frequency sequences (CPFS) in orthogonal frequency division multiplexing (OFDM) system was proposed. The restructuring method was based on the relationship of CPFS and comb-pilots which made a higher LS channel estimation precision. Specifically, the relationship used a convex optimization model, the model was set up using total sub carriers as the variable and min-imized mean square error (MSE) as the principle to generate constraint, where further the optimized restructuring result using Lagrange method was derived. Simulations verify that under the restructured total sub carriers CPFS can enhance the LS channel estimation precision.