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IEEE/ICACT20230157 Slide.05        [Big Slide]       [YouTube]	Oral Presentation
	The objective of our work is to estimate the cascaded channel matrix hG =hB diag(h) and hD. We assume that the RIS may generate D=N+1 different phase shift modes. The received pilot signal at BS in the dth phase shift mode can be expressed as Equation 1. we can rewrite the received signal in the dth phase shift mode as Equation 2. The received signal in all phase shift modes can be expressed as Equation 3.

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