Adjacent Refinement for Enhancing Limited Feedback in MIMO Broadcast Channels
Date Issued
2010
Date
2010
Author(s)
Hu, Hsu-Chieh
Abstract
In multiuser multiple-input multiple-output downlink (MIMO) systems, base stations precode signals in order to suppress the inter-user interference based on channel state information (CSI). Limited feedback enables the practical use of CSI to achieve this goal. The challenge with limited feedback is that the quantization errors create inter-user interference, which can cause through- put ceilings at high SNR. We propose a low-complexity limited feedback method to provide high resolution instead of constructing a large codebook. The method exploits adjacent channel matrix to create refined CSI. We also utilize it to improve scheduling and support multiple resolution. Through simulation results and performance analysis, we demonstrate that proposed method can improve throughput ceiling with lower complexity.
Subjects
MIMO broadcast channels
zero-forcing beamforming (ZFBF)
block diagonalization (BD)
limited feedback systems
throughput ceiling
scheduling
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-99-R97942049-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):0df185d294999ca3f1851a1d4f1f535f