...4 Mbps的速率传输信号的规格，并运用正交频分复用调制方式(orthogonal frequency division multiplexing encoding scheme，OFDM)取代802.11的DSSS 或 FHSS。
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本文研究了自适应正交多载波频分复用（AOFDM）中根据估计出的信道特性选择调制方式的问题。
The problem of how to choose the constellation size based on the estimated channel qualities in AOFDM systems is addressed in this paper.
正交频分复用调制（OFDM）是一种信道利用率很高的调制方式，具有良好的抗衰落能力，可实现并行传送。
OFDM is a modulation method which was often used in the channels. It has better capability against the fading and can realized parallel transmission.
提出利用正交频分复用(OFDM)多载波调制方式代替单载波调制方式对信息进行处理。
The OFDM (Orthogonal Frequency Division Multiplexing) multi-carrier modulation is used to process messages instead of the traditional single carrier modulation.
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