OFDM系统的导频信道估计方法的设计与性能分析

OFDM作为一种多载波的调制方式，在新一代移动通信中得到了非常广泛的应用。信道估计作为其中一种关键技术对系统性能有着十分重要的影响，因此设计一种具有可靠的性能同时又具有比较低的复杂度的估计方法就显得非常重要。本文基于这一目的采用了基于导频的信道估计方法，将LS算法，LMMSE算法，SVD-LMMSE算法应用于信道估计中，在具体的信道模型下对几种算法的性能进行了仿真实验，得到了在不同信噪比的情况下的误比特率变化曲线，并比较了3种算法的性能。

Design and performance analysis about channel estimation method using pilot in OFDM system

OFDM, as a way of multi-carrier modulation, has been a very wide range of applications in next generation of mobile communications. Channel estimation as one of the key technologies on system performance have an important impact, so the design of one estimation method having reliable performance and relatively low complexity estimation methods is very important. This thesis introduces channel estimation method based on pilot in OFDM system, which applies LS algorithm, LMMSE algorithm, SVD-LMMSE algorithm to a specific channel estimation, does simulation experiments on the function of the three algorithms in the specific channel model, comes to the curve of bit error rate in different Signal-to-Noise situations and compares the function of the three algorithms.