摘要
研究了多径信道中PN码时延和信道系数的联合估计问题,提出了一种基于无气味滤波器的时延和多径联合估计方法,得出了频率选择性信道中估计器的仿真结果.然后将参数估计的均方误差与使用扩展的Kalman滤波器得到的均方误差、克拉美-罗限进行了比较,结果表明在多径信道中无气味滤波器的性能比扩展的Kalman滤波器性能更好.
In this paper the problem of joint estimation of PN code delay and multipath channel coefficients is considered. We present an estimator based on the unscented filter (UF) for the joint estimation of delay and multipath, and obtain the simulation results of the estimator. Next the mean square error (MSE) of the UF estimator is compared with both the MSE provided by EKF and the Cramer - Rao lower bound. The results show that the UF performs better than the EKF in multipath channels.
出处
《应用科学学报》
CAS
CSCD
2003年第1期44-48,共5页
Journal of Applied Sciences