基于PN码导频的FMT信道估计方法

Channel estimation based on pseudo-random code pilots in FMT system

针对FMT系统,提出了一种新的基于PN码的信道估计方法,既可用于慢变信道,又可用于快变信道.分析了新方法的计算复杂度和估计性能.仿真结果表明,在瑞利衰落信道下新估计方法的误比特性能优于最小二乘估计,与线性最小均方误差估计性能相似,但计算量远小于线性最小均方误差估计.

This paper provides a new algorithm of channel estimation trased on pseudo-random sequence in filtered muhitone （FMT） system which is not only suitable to slow time varying channel but to fast one. The complexity and the performance of the new estimation algorithm were discussed theoretically. Simulations show that the bit error rate （BER） of this new algorithm is much better than Least Square （LS） algorithm, approximate to linear minimum mean square error （LMMSE） algorithm, but its complexity is less than LMMSE algorithm.