Title :
Robust precoding design for MIMO Interfering Broadcast Channels with limited feedback
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In multiusers MIMO Interfering Broadcast Channels with limited feedback, there are quantization errors of quantized channel direction information (CDI). The system sum-rate performance will certainly degrade due to designing precoder with mismatch channel state information. Using tools from random matrix theory, some statistical characteristics of quantization error for CDI are obtained, and a precoder design scheme is proposed by minimizing the expected mean square error (MMSE). The proposed scheme is robust to the channel uncertainties caused by quantization error. Simulation shows the scheme effectively enhanced the system sum-rate and improved the system reliability.
Keywords :
MIMO communication; broadcast channels; multiuser channels; precoding; quantisation (signal); radiofrequency interference; MIMO interfering broadcast channel; limited feedback; minimum mean square error; mismatch channel state information; multiuser MIMO interfering broadcast channel; quantization error; quantized channel direction information; random matrix theory; robust precoding design; system sum-rate performance; Interference; MIMO; Quantization (signal); Radio transmitters; Robustness; Signal to noise ratio; Telecommunications; MIMO Interfering Broadcast Channels; limited feedback; precoding; random matrix;
Conference_Titel :
Telecommunications (ICT), 2014 21st International Conference on
Conference_Location :
Lisbon
Print_ISBN :
978-1-4799-5139-0
DOI :
10.1109/ICT.2014.6845071
