英语语法分析

Ocean underwater channel is a stochastic acoustic propagation channel with its multipaths, time variety, and frequency spread.

海洋水声信道是多途、时变和频散的信道。

Based on the signal model and the multipath channel model of CDMA system, the steering vectors of multipaths of USES are estimated by using cold filtering method.

根据CD MA系统信号模型和多径信道模型，运用码滤波方法对CD MA系统用户信号及其多径信号导引向量进行估计。