Paper Info
Title
On Interference Alignment With Imperfect Csi: Characterizations Of Outage Probability, Ergodic Rate And Ser
Abstract
In this paper, we give a unified performance analysis of interference alignment (IA) over multiple-input-multiple-output (MIMO) interference channels. Rather than the asymptotic characterization, i.e., degree of freedom (DOF) at high signal-to-noise ratio (SNR), we focus on the other practical performance metrics, namely, outage probability, ergodic rate, and symbol error rate (SER). In particular, we consider imperfect IA because the transmitters usually have only imperfect channel state information (CSI) in a practical scenario. By characterizing the impact of imperfect CSI, we derive the exact closed-form expressions of outage probability, ergodic rate, and SER in terms of CSI accuracy, transmit SNR, channel condition, number of antennas, and the number of data streams of each communication pair. Furthermore, we obtain some important guidelines for performance optimization of IA under imperfect CSI by minimizing the performance loss over IA with perfect CSI. Finally, our theoretical claims are validated by simulation results.
Year
DOI
Venue
2016
10.1109/TVT.2015.2397000
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Keywords
Field
DocType
Imperfect channel state information (CSI), interference alignment (IA), multiple-input-multiple-output (MIMO) interference channel, performance analysis
Degrees of freedom (statistics),Imperfect,Expression (mathematics),Computer science,Ergodic theory,Signal-to-noise ratio,MIMO,Communication channel,Electronic engineering,Interference (wave propagation)
Journal
Volume
Issue
ISSN
65
1
0018-9545
Citations 
PageRank 
References 
4
0.39
26
Authors
2
Name
Order
Citations
PageRank
Xiaoming Chen130128.67
Chau Yuen24493263.28