一种MC-CDMA最小二乘信道估计的改进算法  

An Improved Algorithm for LS Channel Estimation in MC-CDMA

作　　者：崔健[1] 陈洪[2] 张尔扬[1] 

机构地区：[1]通信指挥学院,湖北武汉430010 [2]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《通信技术》2007年第8期4-6,共3页Communications Technology

摘　　要：文中提出一种LS信道估计改进算法,该算法利用MC-CDMA中闲置的虚载波对信道噪声功率进行估计,通过将LS信道估计的时域响应限制在循环前缀长度内,并进一步利用信道噪声功率估计值,设置门限值忽略LS信道时域响应在循环前缀长度内的噪声分量和无效径响应。文中的算法运算量小,信道估计精度高,仿真结果验证了算法的有效性。In this paper, an improved algorithm for LS channel estimation is proposed, the algorithm increases the accuracy remarkably through restricting the channel response to the length of CPand ignoring channel noise and invalid channel response based on the noise power estimated. The algorithmhas low complexity and high accuracy, and is validated by computer simulation.

关 键 词：MC-CDMA 导频 信道估计 

分 类 号：TN914.4[电子电信—通信与信息系统]