Paper Info
Title
A New Ordered Decision Feedback Equalization Algorithm for Spatial Multiplexing Systems in MIMO Channel
Abstract
In rich scattering environments, multiple antenna systems designed to accomplish spatial multiplexing have enormous potential of lifting the capacity of corresponding multiple input multiple output channels. In this paper, we present a new low complexity algorithm for decision feedback equalization detector in the SM scheme. The basic idea is to reduce the joint optimization problem to separate optimization problems to achieve better performance-complexity tradeoffs. Concretely, we separately optimize the detection order and the detector filters so that the complexity of the entire signal detection task is reduced. The new order search rule approximates the optimal Bell Labs layered space time (BLAST) approach from a geometrical perspective, and the detector filters are derived using a Cholesky based QR decomposition. The new algorithm is able to switch from zero forcing to minimum mean square error without additional operations and the computational effort is a small fraction of that in the optimal BLAST algorithm. Despite its low complexity, the error performance of new detector closely approximates that of the standard BLAST.
Year
DOI
Venue
2007
10.1093/ietfec/e90-a.11.2546
IEICE Transactions
Keywords
Field
DocType
new order search rule,corresponding multiple input,multiple output channel,low complexity,decision feedback equalization detector,equalization algorithm,new algorithm,mimo channel,spatial multiplexing systems,new ordered decision feedback,new low complexity algorithm,detector filter,new detector,multiple antenna system,blast,complexity reduction,ordering,spatial multiplexing
Equalization (audio),Minimum mean square error,Algorithm,Reduction (complexity),Detector,Optimization problem,Spatial multiplexing,Mathematics,QR decomposition,Cholesky decomposition
Journal
Volume
Issue
ISSN
E90-A
11
0916-8508
Citations 
PageRank 
References 
0
0.34
6
Authors
4
Name
Order
Citations
PageRank
Wenjie Jiang125626.60
Yusuke Asai25415.85
Takeshi Onizawa33911.20
Satoru Aikawa4359.39