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 SchemeMU-MIMO full feedbackMU-MIMO partial feedbackSU-MIMO

Preferred layer 1 CQI4 bits4 bits4 bits
Preferred layer 2 CQI4 bits4 bits
Alternative layer 1 CQI4 bits
Alternative layer 2 CQI4 bits
Preferred matrix index1 bit1 bit1 bit

Total bits per RB17 bits9 bits5 bits