Title :
On Implementing Spatial-Correlation-Information Aided Feedback in Practical MIMO Systems
Author :
Chen, Jinhui ; Li, Dong ; Yang, Hongwei ; Liu, Hao ; Lu, Di ; Wu, Lu
Author_Institution :
Res. & Innovation Center, Alcatel-Lucent Shanghai Bell, Shanghai, China
Abstract :
This work investigates implementing spatial-correlation-information aided feedback in practical multiple-input multiple-output (MIMO) systems. It is presented that the existing spatial-correlation-information aided feedback approach could be simplified in computational complexity with little performance loss. In comparison with Grassmannian codebooks, the feedback codebooks in the 3GPP LTE Release-8 specification is shown to be a near-optimal base codebook. An efficient quantization approach is proposed for quantizing transmit spatial covariances matrices for closely-spaced co-polarized uniform linear arrays (ULA). The good performance of the entire practical feedback solution is demonstrated via system-level simulation.
Keywords :
3G mobile communication; Long Term Evolution; MIMO systems; computational complexity; covariance matrices; quantisation (signal); 3GPP LTE Release-8 specification; Grassmannian codebooks; computational complexity; near-optimal base codebook; practical MIMO systems; quantization; spatial-correlation-information aided feedback; transmit spatial covariances matrices; uniform linear arrays; Correlation; Covariance matrix; MIMO; Quantization; Receiving antennas; Transforms; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-8328-0
DOI :
10.1109/VETECF.2011.6093026
