Skip to main content

Table 3 Complexity comparison between the RBF and the SUS-ee

From: Low-complexity multiuser MIMO downlink system based on a small-sized CQI quantizer

 

RBF

SUS-ee

BS

  

   Pre-coding

N/A

M × M matrix inversion

   User selection

Simple magnitude comparison between quantized CQIs from K users

Vector computations are needed between the previously selected users and the rest of the users until constructing users up to M

   Feed-forward information

One desired effective channel out of M = 4 effective channels

One desired effective channel out of 2 B CDI effective channels

MS

  

   Finding feedback information

Compute M = 4 combining vectors and CQIs

Compute 2 B CDI combining vectors and CQIs