Precoder selection under K-best MIMO detection for 3GPP-LTE/LTE-A systems
Journal
APCC 2012 - 18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation"
Date Issued
2012
Author(s)
Wang, Chuan
Abstract
Precoding by using a finite-set codebook at transmitters is an effective approach to improve the performance of multiple-input multiple-output (MIMO) systems with reduced feedback overhead. K-Best sphere decoders are popular for high-throughput spatially-multiplexed MIMO signal detection at receivers. In this paper, we propose a precoding-matrix-index (PMI) selection criterion suitable for K-best MIMO detectors by minimizing the trace of the upper triangular matrix after QR decomposition (QRD). To further improve the system performance, fully-sorted QRD, per-layer sorted QRD and partially-sorted QRD are also proposed to be incorporated in the minimum-trace PMI selection criterion. Simulation results based on the MIMO codebooks of 3GPP-LTE/LTE-A systems show the improvements of the proposed scheme compared to the non-precoding MIMO schemes and the precoding schemes using the conventional PMI selection criterions. © 2012 IEEE.
Event(s)
18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation", APCC 2012
Subjects
3GPP-LTE
finite feedback
K-Best sphere decoder
LTE-Advanced
multiple-input multiple-output
precoder
sorted QR decomposition
spatial-multiplexing
SDGs
Description
Jeju Island, 15 October 2012 through 17 October 2012
Type
conference paper