二维RAKE接收机中一种新的信道矢量估计算法

A Novel Algorithm of Channel Vector Estimation for 2-D RAKE Receiver

在二维RAKE接收机中,通常仅用导频信道来估计信道矢量,当导频功率较低时,估计误差较大。本文 提出一种新的信道矢量估计算法,该算法采用导频信道与业务信道联合估计技术,通过分集组合两个信道的估计结 果,使信道矢量的估计精度得到了提高,仿真结果表明:该算法能有效地降低系统的误码率。

Channel vector is estimated only by utilizing pilot channel in 2-D RAKE receiver conventionally. The estimation error will be large when the power of pilot signal is weak. A novel algorithm of channel vector estimation is proposed in this paper. The proposed algorithm employs both pilot and traffic channels jointly to estimate the channel vector. The estimation accuracy is improved through diversity combining technology. Computer simulation demonstrates that the system bit error ratio (BER) decreases effectively.