deteriorated due to meaning in Chinese

由于…变质由于……变质

Conventional detector ( single - user matched filter ) distinguishes each user by the crosscorrelation of their spread - spectrum codes . in practice , however , its performance is much deteriorated due to the existence of noise in channel and strong multi - access interference , i . e . near for effect . a new method using independent component analysis is proposed in this paper . the - received energy of signals is controlled effectively , thus the near - far effect is overcome as much as possible ; moreover , the effect that noise imposed on the detector is mostly reduced . simulations verify the effectiveness of this method
传统检测器(单用户匹配滤波)利用扩频码之间的互相关特性来区分各用户信号.而在实际应用中，信道噪声和近距离用户对远距离用户的强多址干扰即远近效应，使得接收机的性能受到很大影响.本文将独立分量分析法引入传统接收机，有效控制接收信号的能量，从而极大地提高了接收机的抗远近性能，同时噪声的影响被尽可能消除.仿真结果表明了该方法的有效性和可行性