基于PN码的间隔式导频的OFDM信道估计方法

Channel Estimation Method Based on Pseudo-random Code and Alternation Pilots in OFDM Systems

在现有理论基础上提出一种基于PN码的间隔式导频的OFDM信道估计方法,该方法利用了PN码的性质,降低了算法的复杂度,尤其适用于快变信道。仿真表明,在多径信道下新的估计方法性能优于最小二乘估计和线性最小均方误差估计,并且计算量最小。

According to the current basis of orthogonal frequency division multiplexing （OFDM）, this paper provides a new algorithm of channel estimation in OFDM systems which is based on pseudo-random code sequence. The algorithm is not only reduce the complication of the method but suitable to fast time-varying channel. Simulations show that the new method is better than linear minimum mean square error （LMMSE） and least square （LS） and the operation of the new method is the most simple.