Channel Feedback Optimization for Network MIMO Systems

Donghyun Kim, Oh-Soon Shin, Illsoo Sohn, Kwang Bok Lee
2012 IEEE Transactions on Vehicular Technology  
We investigate channel feedback optimization for network multiple-input multiple-output (MIMO) systems. We consider feedback channel selection to exploit channel asymmetry inherent to network MIMO systems and also consider feedback bit allocation which allows an unequal number of feedback bits to be allocated to users according to the selected channel condition. We derive the upper bound of the expected rate loss due to channel selection and quantization and propose two algorithms referred to
more » ... successive algorithm and iterative algorithm, which jointly optimize the channel selection and bit allocation. Through computer simulations, we show that the proposed algorithms provide significant amount of performance gain with greatly reduced complexity as compared to an exhaustive search.
doi:10.1109/tvt.2012.2201762 fatcat:cgywqifijrampfco56ziw4if7u