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1·OFDM technology has many advantages, such as defending the multipath fading and high bandwidth efficiency, which are suitable for the high-rate data transmission in wireless enviroment.

而且OFDM技术具有抗多径衰落，频谱利用率高等优点，特别适合于无线环境下的高速数据传输。

2·It can both effectively combat multipath fading and improve bandwidth efficiency.

这种技术可以有效的对抗多径衰落以及提高频带利用率。

3·In the future broadband wireless communications, there will be two severe challenges to be faced, which are frequency selective fading channels and bandwidth efficiency.

在未来宽带移动通信中，存在两个最严峻的挑战：多径衰落信道和带宽效率。