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本文介绍了无线信道的特征,进而引出多载波调制技术,着重介绍了正交频分复用(OFDM)的原理,优缺点及其在无线通信中的广泛应用。
This paper introduces the characteristics of wireless channel, and then leads to multi-carrier modulation technology, focuses on the principle of Orthogonal Frequency Division Multiplexing (OFDM), its advantages and disadvantages and its widely used in wireless communications.