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IEEE/ICACT20230070 Slide.20        [Big Slide]	Oral Presentation
	The channel matrix estimated for the uplink line was used for the downlink line, and simulation was performed with precoding required for transmission. Figure 5 shows the BER characteristics for the case of 16 terminals. Figure 5 shows that the estimation accuracy is high for the downlink except for the case where the number of transmitting and receiving antennas is the same. Considering these results, we believe that intercommunication using ICA is effective in large-scale MIMO systems.

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