From: Low-complexity multiuser MIMO downlink system based on a small-sized CQI quantizer
 | RBF | SUS-ee |
---|---|---|
BS | Â | Â |
   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 effective channels |
MS | Â | Â |
   Finding feedback information | Compute M = 4 combining vectors and CQIs | Compute combining vectors and CQIs |