A Joint Real Grassmannian Quantization Strategyfor SISO IA with ... ... br>channel state information to transmitters. The key problem is to<br>acquire accurate transmitter channel state information (CSIT)<br>in the presence of the quantization error. In this paper, a joint<br>real Grassmannian quantizatio
An optimal adaptive quantization index modulation watermarking a... ... algorithm in discrete wavelet transform (DWT) based on quantization index modulation (QIM) technique is presented. The host image ... by applying QIM. To improve the invisibility and robustness of watermarking system, the quantization step for each embedding