IEEE/ICACT20240241 Slide.09        [Big Slide]       [YouTube] Oral Presentation
Then, the two received signals are superimposed, and the same operation is performed on the sensing matrix. Because of the change of phase shift matrix , the received signals from the ith RIS can be regarded as a column vector. As shown in the figure below, after the above transformation, the signal reflected only by the ris reflection units in the left column can be obtained.

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