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The effect of angle division on the MSE of positioning is depicted in Fig. 4. The accuracy of CS depends largely on the meshing of channels in the MP algorithm. When the uniform sampling number is small and the user is not on the grid point, a large positioning error may appear. As illustrated in Figure 4, when the number of uniform samples increases, the MSE gradually decreases and the volatility of MSE also decreases. When the number of uniform samples increases indefinitely, the MSE will tend to be 0. If the user is located on the grid, the MSE also becomes 0. The MSE tends to be stable when the number of RIS reflection units exceeds 64. |
IEEE/ICACT20240241 Slide.18
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