摘要
为了最大限度地抑制无线信道中背景噪声对CDMA通信系统前向链路的影响,提高移动终端的接收信噪比,利用小波神经网络能自适应消除背景噪声的特点,对CDMA基带信号进行消噪处理。基于这种消噪模式,对整个CDMA通信系统的消噪处理过程进行了理论分析和计算机仿真,结果表明:这种消噪模式可以改善无线传播信道对CDMA通信系统中输入信噪比门限的影响。因此,利用小波神经网络对CDMA基带信号进行消噪处理,可以取得较理想的消噪效果。
In order to reduce the influence from wireless channel to CDMA system's forward link, furthest to restrain random noise, finally to improve the SNR of mobile terminal, penman introduces WNN to denoise to the baseband signals in CDMA system's forward link channel. Based on the denoising mode, the denoising process was theoretically analyzed and imitated. The results indicate that the denoising mode can reduce the influence from wireless channel to CDMA system's forward link. Therefore, the application of WNN in wireless channel gets the perfected denoising effect.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第9期138-140,共3页
Journal of Chongqing University
