For atmospheric radio noise is the main interferential factor, the minimum-mean-error multiuser detector is employed in South China Sea for background noise and near-far problem. 以我国的南海海域为例，其背景噪声主要是大气噪声，针对背景噪声相对较强的远近效应现象，提出利用最小均方误差多用户检测技术的方法，并对其互相关函数进行了理论分析和计算。
