 |
Next, the accuracy of the channel estimation was evaluated by the mean squared error of the channel estimate.
Figure 6 shows the mean squared error when the number of base station antennas is 16, 24, and 32, respectively, with the ideal characteristic being the case where signal detection is performed correctly.
Here, all elements of the channel estimation matrix H were estimated and their average was taken as the channel MSE.
From Figure 6, it can be read that when the number of base station antennas is increased to 24, the SNR is more than 8 dB and the estimation accuracy is equivalent to the ideal characteristic.
Furthermore, when the number of base station antennas is increased up to 32, the estimation accuracy becomes equivalent to that of the ideal characteristic when the SNR is 4 dB or higher.
The above results confirm that channel estimation accuracy improves in a system with many terminal antennas connected simultaneously, indicating that channel estimation using ICA is effective. |
IEEE/ICACT20230070 Slide.21
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