Paper Info
Title
Channel-aware adaptive receivers for linearly precoded MIMO-OFDM systems with imperfect CSIT.
Abstract
Within the context of linearly precoded MIMO-OFDM (combination of multiple antenna techniques with multicarrier transmission schemes such as orthogonal frequency division multiplexing) systems with multiple-stream transmission, maximum likelihood detection (MLD) has been shown to offer large performance gains when compared to an all-linear setup (i.e., linear transmitter/receiver) when either perfect or imperfect channel state information at the transmitter (CSIT) is available. Unfortunately, these gains come at the cost of a higher complexity. In particular, the increase in computational cost is more significant when the receiver is designed to operate with soft information and even more dramatic when, in order to optimise error rate performance, iterative decoding is allowed. In order to exploit the best features of each detection technique, this paper proposes a method to selectively choose the detection strategy (ML or linear) for each individual subcarrier as a function of the instantaneous channel conditions and CSIT accuracy. Numerical results show that a cautious and selective use of ML detection substantially reduces complexity while still reaping most of the performance advantage.
Year
DOI
Venue
2013
10.1186/1687-1499-2013-240
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
Orthogonal Frequency Division Multiplex, Power Allocation, Minimum Mean Square Error, Orthogonal Frequency Division Multiplex Symbol, Soft Information
Subcarrier,MIMO-OFDM,Transmitter,Telecommunications,Computer science,Word error rate,Communication channel,Minimum mean square error,Electronic engineering,Real-time computing,Decoding methods,Orthogonal frequency-division multiplexing
Journal
Volume
Issue
ISSN
2013
1
1687-1499
Citations 
PageRank 
References 
8
0.35
18
Authors
2
Name
Order
Citations
PageRank
Felip Riera-Palou121131.02
Guillem Femenias235445.43