Title :
Analytical investigation on DL MU-MIMO performance with increased feedback bits
Author :
Yamindi, Jean-Baptiste ; Hong Ji ; Wu Mu-qing
Author_Institution :
Sch. of Inf. & Telecommun. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This paper investigates downlink MU-MIMO for further improvement using an analytical method. The method shows that the potential benefit for MU-MIMO with increased feedback is strongly dependant to channel frequency selectivity. The introduced codebook with 8- and 12-bt PMI cases are shown to exploit the structure to significantly lower the complexity of PMI searches. Link level simulations confirm our findings.
Keywords :
MIMO communication; codes; feedback; radio links; DL MU-MIMO performance; PMI case; analytical method; channel frequency selectivity; codebook; increased feedback bit; link level simulation; word length 12 bit; word length 8 bit; Channel estimation; Downlink; Educational institutions; Indexes; MIMO; Telecommunications; Vectors; channel; codebook; feedback; frequency selectivity; quantization;
Conference_Titel :
Antennas and Propagation (APCAP), 2012 IEEE Asia-Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-0666-9
DOI :
10.1109/APCAP.2012.6333129
