Since the above disadvantage of particle filter, some improved algorithms, such as U-particle filter and Square Root Unscented particle filter has been presented in this dissertation.

• 针对粒子滤波存在的上述问题,本文提出了一些改进算法:U-粒子滤波算法、平方根U-粒子滤波算法,并将各种算法结合起来,得到了一种更适用于通信系统的改进算法。