Open Access
Table 1.
CEA-CDI
| Algorithm 1: CEA-CDI |
|---|
| Input: initial channel estimation H(0), received data symbol Yd, constellation symbol Xi |
| Output: the channel estimation after CEA-CDI |
| Step: |
1) Soft decision of Yd: According to (21), calculate the soft decision information  of Yd; |
2) Pilot extension: Combining the pilot symbol and  to form an extended pilot, then according to (20), calculate the p + 1 round EM iteration result  ; |
3) Time-domain truncation: According to (22), truncate  based on channel length in the time domain, get p + 1 round final result H(p+1); |
| 4) Determine if the gap between H(p + 1) and H(p) is small enough, i.e.H(p + 1) − H(p) < δ. If satisfied, stop the iteration; Otherwise, repeat step (2) to (4). |
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