A watermarking scheme based on the discrete cosine transform (DCT) was studied. A new blind watermarking algorithm by embedding the watermark into the phase components of DCT was proposed.
Aiming at the phase ambiguity of the blind channel estimation in frequency domain, a blind channel estimation method in frequency domain based on dissymmetrical modulation constellation was proposed.
针对频域信道盲估计的相位模糊问题，提出了基于非对称调制星座的频域信道盲估计方法。
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Studies on phase I clinical trials of artesunate tablet were carried out with double blind method in 22 male healthy volunteers.