MIMO channels with limited rate feedback and RVQ MIMO kanallarda sinirli hizda geribesleme ve RVQ


Yilmaz A. O. , Guevensen G. M.

2007 IEEE 15th Signal Processing and Communications Applications, SIU, Eskişehir, Turkey, 11 - 13 June 2007 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/siu.2007.4298746
  • City: Eskişehir
  • Country: Turkey
  • Middle East Technical University Affiliated: Yes

Abstract

The capacity increases promised by multi-input multi-output (MIMO) systems usually come with requirements in regard to channel knowledge. We study the capacity of a MIMO scheme with perfect channel state information (CSI) at the receiver side where the transmitter has only a quantized version of the CSI due to a limited rate feedback channel. Random vector quantization is investigated along with a reduced number of precoders. It is found out that capacity losses are quite tolerable even in the case of small number of bits per quantized precoder.