Table 1 Comparison of the computational payload for codebook design approach
From: Low complexity precoding codebook design based on DFRST for limited feedback precoded OSTBC systems
MIMO | Feedback | DFT | DFRST | CCRR |
|---|---|---|---|---|
4×4 | 2 bits | 768 | 192 | 75% |
| Â | 4 bits | 983,040 | 61,440 | 93.75% |
|  | 6 bits | 1.057×109 | 1.652×107 | 98.44% |
6×6 | 2 bits | 12,288 | 3072 | 75% |
|  | 4 bits | 2.517×109 | 1.573×107 | 93.75% |
|  | 6 bits | 4.329×1012 | 6.765×1010 | 98.44% |
8×8 | 2 bits | 196,608 | 49,152 | 75% |
|  | 4 bits | 6.443×1010 | 4.027×109 | 93.75% |
|  | 6 bits | 1.773×1016 | 2.771×1014 | 98.44% |