本文结合IEEE802.11n 标准分析了4G 中的关键技术，并对其应用前景进行了一定展望，对于我国无线局域网标准的选择，具有一定研究意义。-This paper analyzes 4G IEEE802.11n standards in key technology and its application prospect some prospects for China' s WLAN standard choice of a certain significance.