扩频CDMA水印性能分析及其应用研究

Performance analysis of spread spectrum CDMA watermarking and applied research

通过对扩频码分多址(CDMA)水印模型的编码及检测方法进行理论分析,阐述了信息嵌入量、扩频码长、检测错误率、信道容量等指标之间存在的制约关系,并用试验进行比较和验证.理论结果与多小波变换域内的实验结果表明所提出的模型和算法既有较高的嵌入容量,又具有较强的鲁棒性和安全性.

This paper analyzes the encoding and detection methods in spread spectrum Code Division Multiple Access （CDMA） watermarking model, in which the trade - off relation is clearly illuminated among embedded information number, code length, detection error probability and channel capability. And then these conclusions are compared and verified with experimentations. The theoretical results and the empirical data obtained in multiwavelet domain demonstrate that the proposed model and algorithm provide higher embedding capacity as well as more robust and secure against attack.