Performance Evaluation of Closed-Loop Spatial Multiplexing Codebook Based on Indoor MIMO Channel Measurement
Joint Authors
Zhang, Jianhua
Tao, Xiaofeng
Xiong, Yanwei
Gao, Junjun
Sun, Yanliang
Source
International Journal of Antennas and Propagation
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-21
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Closed-loop MIMO technique standardized in LTE can support different layer transmissions through precoding operation to match the channel multiplexing capability.
However, the performance of the limited size codebook still needs to be evaluated in real channel environment for further insights.
Based on the wideband MIMO channel measurement in a typical indoor scenario, capacity loss (CL) of the limited size codebook relative to perfect precoding is studied first in two extreme channel conditions.
The results show that current codebook design for single layer transmission is nearly capacity lossless, and the CL will increase with the number of transmitted layers.
Furthermore, the capacity improvement of better codebook selection criterions is very limited compared to CL.
Then we define the maximum capacity boost achieved by frequency domain layer adaption (FDLA) and investigate its sensitivity to SNR and channel condition.
To survey the effect of frequency domain channel variation on MIMO-OFDM system, we define a function to measure the fluctuation levels of the key channel metrics within a subband and reveal the inherent relationship between them.
Finally, a capacity floor resulted as the feedback interval increases in frequency domain.
American Psychological Association (APA)
Gao, Junjun& Zhang, Jianhua& Xiong, Yanwei& Sun, Yanliang& Tao, Xiaofeng. 2012. Performance Evaluation of Closed-Loop Spatial Multiplexing Codebook Based on Indoor MIMO Channel Measurement. International Journal of Antennas and Propagation،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-491691
Modern Language Association (MLA)
Gao, Junjun…[et al.]. Performance Evaluation of Closed-Loop Spatial Multiplexing Codebook Based on Indoor MIMO Channel Measurement. International Journal of Antennas and Propagation No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-491691
American Medical Association (AMA)
Gao, Junjun& Zhang, Jianhua& Xiong, Yanwei& Sun, Yanliang& Tao, Xiaofeng. Performance Evaluation of Closed-Loop Spatial Multiplexing Codebook Based on Indoor MIMO Channel Measurement. International Journal of Antennas and Propagation. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-491691
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-491691