用于无线网络用户识别的实时水印算法

Real-time Watermarking Algorithm Applied in Wireless Network for User Identification

将数字水印技术引入无线宽带网络,应用小波变换、分集技术和扩展频谱完成数据传输的水印嵌入和提取,实现了有权用户的实时鉴权。信道仿真表明,该算法具有较好的不可感知性和稳健性,在不同信噪比条件下水印信号检测概率大。对运算量的估计表明,算法具有一定的有效性和可行性。

Digital watermarking technology is introduced to wireless broadband network. Wavelet transform, diversity technology and spread spectrum are adopted to realize watermark embedding and extraction. Thus it can identify entitled users in wireless network. Channel simulation shows that the algorithm has perfect imperceptibility and robustness. In condition of different signalto-noise ratios, watermark extraction probability is considerable high. The estimation of calculation indicates that the method is effective and feasible.