摘要
分析信道估计算法的种类及性能,采取不同于一般研究立足于借助信道先验信息或更改插值处理方法的措施,提出一种基于旋转因子的信道估计方法。该方法借助逆运算能够削弱信道噪声的影响,在接收端贴近理想信道还原出发射信息,并且具备较低的计算复杂度。通过Matlab仿真发现,该算法性能比MMSE更高,需求计算量小,在噪声较大的信道,可以灵活调整旋转因子的值来适应。
It analyzed the characteristics and performances of diversified channel estimation algorithms,developed a new algorithm based on rotating factor instead of ordinary measure of interpolation or prefix. With the help of rotating factor,the algorithm can weaken the effects of channel noise,and restore the sending message in the receiver nearly close to the idea channel. Compared with MMSE,the algorithm has the less complexity but owes the similar performance. After simulation by matlab,it is found that in the bigger noise surroundings,the rotating factor can be adjusted accordingly to fit the change of channel.
出处
《邮电设计技术》
2016年第8期53-56,共4页
Designing Techniques of Posts and Telecommunications
关键词
OFDM
信道估计
先导
插值
旋转因子
OFDM
Channel estimation
Prefix
Interpolation
Rotating factor
