【摘要】 提出了一种面向直接序列扩频(DS-CDMA)通信系统的基于导频信号的自适应信道估计方法.该方法在CDMA前向链路上采用计算效率高、易于实现的导频信号滤波器.针对不同的移动信道环境,可以从事先计算得到的表中选出最优导频信号滤波器系数,以实现自适应信道估计.仿真结果表明,采用了这种自适应信道估计方法的CDMA系统的误码率性能比非自适应系统有很大提高.更多还原

【Abstract】 The estimation scheme for DS-CDMA systems includes a computationally efficient and easily implemented pilot filter on CDMA forward channel. For different mobile channel environments, the optimal coefficients of pilot filter can be selected from pre-calculated table of coefficients to implement adaptive channel estimation. The simulation results illustrate that CDMA systems using the proposed adaptive channel estimation scheme can achieve better BER performance than non-adaptive schemes.更多还原