Paper Info
Title
Transmit Precoding in Underlay MIMO Cognitive Radio With Unavailable or Imperfect Knowledge of Primary Interference Channel.
Abstract
This paper addresses the problem of precoder design that maximizes the throughput of a secondary user (SU) in an underlay multiple-input multiple-output cognitive radio network, where the channel state information (CSI) from the SU to the primary user (PU) is unavailable or inaccurate. The design maintains the quality of service for the PU through an interference amount measure in terms of the interference temperature or the leakage rate. For the case of unknown CSI, we propose an iterative adaptation algorithm by exploiting the side information in the primary communication network. For the case of imperfect CSI, we model the amount of uncertainty to be within a convex set defined by the Schatten norm and apply the maximin optimization to obtain the solution. To complete this paper, we derive the conditions on the CSI uncertainty radius under which the robust design with imperfect CSI would not perform better than the one with unknown CSI, when using the interference temperature metric. The proposed techniques are supported by numerical simulations.
Year
DOI
Venue
2016
10.1109/TWC.2016.2553659
IEEE Trans. Wireless Communications
Keywords
Field
DocType
Interference,Quality of service,Uncertainty,Measurement,Robustness,MIMO,Precoding
Mathematical optimization,MIMO,Underlay,Interference (wave propagation),Throughput,Zero-forcing precoding,Precoding,Mathematics,Channel state information,Cognitive radio
Journal
Volume
Issue
ISSN
15
8
1536-1276
Citations 
PageRank 
References 
6
0.43
23
Authors
2
Name
Order
Citations
PageRank
Mohannad H. Al-Ali181.13
K.C. Ho21311148.28