Title :
Switched-mode limited feedback for cooperative multiceli MIMO systems
Author :
Wu, Y.T. ; Sun, Y.Z. ; Yu, F.
Author_Institution :
Key Lab. of Special Fiber Opt. & Opt. Access Network, Shanghai Univ., Shanghai, China
Abstract :
A switched-mode limited feedback scheme with sum-rate maximizing beamforming is proposed for cooperative multiceli MIMO systems. In order to enhance the sum-rate performance, the proposed scheme switches between three modes, where different channel state information (CSI) is chosen and quantized with variable resolution. The feedback bit allocation within each mode is optimized according to the interfering signal strength. Simulation results show that the proposed limited feedback scheme yields higher sum-rate than the conventional solutions such as non-cooperative eigen-beamforming in the high SINR regime.
Keywords :
MIMO communication; array signal processing; cooperative communication; feedback; channel state information; cooperative multiceli MIMO systems; feedback bit allocation; interfering signal strength; limited feedback scheme; noncooperative eigen-beamforming; scheme switches; sum-rate maximizing beamforming; switched-mode limited feedback; Base stations; MIMO; Robustness; Uplink; Vector quantization; Wireless networks; Channel state information; Cooperative systems; Limited feedback; MIMO;
Conference_Titel :
Signal Processing, Communication and Computing (ICSPCC), 2013 IEEE International Conference on
Conference_Location :
KunMing
DOI :
10.1109/ICSPCC.2013.6663975
