计算机工程与应用2018，Vol.54Issue(1)：133-139,7.DOI:10.3778/j.issn.1002-8331.1607-0012
基于DCT的声呐探测信号鉴定方法
Sonar signal identification method based on Discrete Cosine Transform
摘要
Abstract
In view of underwater acoustic emission source is more. To identify the enemy emission source sonar accurately, combined with the time-frequency domain characteristics of DCT(Discrete Cosine Transform), time-frequency coefficients embedded watermark identification method is proposed based on DCT. Through the time-frequency coefficients of discrete cosine transform to embed digital watermark, this method considers the channel characteristics to generate watermark, combined with the basic characteristics of two-dimensional DCT matrix to change the embedding position of the watermark and the watermark number for simulation test. The detection performance simulation results show that the proposed method can achieve the best way to achieve the optimal embedding without affecting the signal itself, the performance of the detection accuracy can be improved.关键词
离散余弦变换(DCT)/酉矩阵/时频域/数字水印Key words
Discrete Cosine Transform(DCT)/unitary matrix/time-frequency domain/digital watermark分类
信息技术与安全科学引用本文复制引用
丁智慧..基于DCT的声呐探测信号鉴定方法[J].计算机工程与应用,2018,54(1):133-139,7.基金项目
国家自然科学基金(No.11574120) （No.11574120）
江苏省自然科学基金(No.BK20161359) （No.BK20161359）
江苏高校高技术船舶协同创新中心/江苏科技大学海洋装备研究院项目(No.HZ2016010) （No.HZ2016010）
水声对抗技术重点实验室基金. （）
