Research Article
Exploiting Spatial and Frequency Diversity in Spatially Correlated MU-MIMO Downlink Channels
Table 3
Feedback overhead for the considered MIMO schemes for
,
.
| | Feedback Scheme | MU-MIMO full feedback | MU-MIMO partial feedback | SU-MIMO |
| | Preferred layer 1 CQI | 4 bits | 4 bits | 4 bits | | Preferred layer 2 CQI | 4 bits | 4 bits | | | Alternative layer 1 CQI | 4 bits | — | — | | Alternative layer 2 CQI | 4 bits | — | — | | Preferred matrix index | 1 bit | 1 bit | 1 bit |
| | Total bits per RB | 17 bits | 9 bits | 5 bits |
|
|
