Hello,it's a pleasure to enjoy you presentation.Have you measured the effectiveness of channel estimation?How reliable is it?
Thank you for your question. Since channel tracking uses prior knowledge obtained from channel estimation, we expect that channel tracking NMSE to follow the channel estimation NMSE. In other words, an accurate channel estimation should be reflected in the channel tracking in terms of NMSE.
We measured the effect of channel estimation on channel tracking as a function of SNR and the number of measurements, as shown in slide 12.
First, as the SNR increases, the channel estimation NMSE decreases. The figure on the left shows this effect, where the channel tracking NMSE (determined with different gamma values) follows the shape of the channel estimation NMSE and decreases as the SNR increases.
Second, as the number of measurements increases, the channel estimation NMSE decreases. We expect the channel tracking NMSE to decrease as the number of measurements increases for the same reason we discussed above. The figure on the right in slight 12 shows this effect.
In conclusion, the channel tracking NMSE follows the channel estimation NMSE with some degradation. Compared to other papers (discussed in the numerical section), the proposed method is more reliable. For example, at 0dB, the channel tracking NMSE is about -10dB, which is comparable with most of the channel estimation methods in the literature. However, I believe we need to apply it to real data for actual reliability analysis.
