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基于OFDM的数字水印技术在无线传输中的应用研究

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摘要 正交频分复用(OFDM)技术以其频谱利用率高、抗多径、在高效带宽利用率情况下的高速传输能力以及根据信道条件对子载波进行灵活调制的能力,已在数字音频广播、数字电视以及无线局域网等无线高速数据传输系统中广泛应用,并将成为未来第四代移动通信的关键技术之一。在开放的环境中,怎样让高速传输中的数据准确地到达信宿而不被非法利用,显得格外重要。本文将数字水印技术与OFDM调制技术相结合,提出了在无线网络物理层的基带信号中嵌入和提取水印的算法,算法的鲁棒性表现为抵抗无线信道干扰的能力。
作者 黄波
出处 《科技创新导报》 2008年第32期28-29,共2页 Science and Technology Innovation Herald
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