Paper Info
Title
Low complexity power allocation scheme for regenerative multi-user relay networks
Abstract
In relay assisted wireless communications, the multi-source, single relay and single destination system (an M-1-1 system) has garnered significant interest, due to the increased demand for higher network throughput and connectivity. Previously, power allocation at the relay in M-1-1 systems have assumed availability of instantaneous channel state information (CSI), which is rather idealistic. In this paper we consider an M-1-1 Decode-and-Forward (DF), Full-Duplex, orthogonal frequency division multiple access (OFDMA) based relay system with statistical-CSI and analyze the achievable rate R of such a system. We show how R can only be maximized by numerical power allocation schemes which have high-complexity of order O(M3). By introducing a rational approximation in the achievable rate analysis, we develop a low-complexity power allocation scheme at the relay that can obtain a system achievable rate very close to the maximum R. Most importantly, we show that the complexity of our power allocation scheme is of the order O(M log M). Our power allocation scheme is suitable for a multiuser relay system, where the priority is to maximize the system throughput. The work we present in this paper will be of value to the design and implementation of real-time multi-user relay systems operating under realistic channel conditions.
Year
DOI
Venue
2014
10.1109/ICC.2014.6884183
Communications
Keywords
Field
DocType
OFDM modulation,approximation theory,decode and forward communication,frequency division multiple access,multiuser channels,relay networks (telecommunication),M-1-1 decode-and-forward based relay system,OFDMA,full-duplex based relay system,low complexity power allocation scheme,multisource system,network connectivity,network throughput,numerical power allocation schemes,orthogonal frequency division multiple access based relay system,rate analysis,rational approximation,regenerative multiuser relay networks,relay assisted wireless communications,single destination system,single relay system,system throughput maximization
Relay channel,Wireless,Computer science,Orthogonal frequency-division multiple access,Computer network,Throughput,Relay,Link Access Procedure for Frame Relay,Multi-user,Channel state information
Conference
Volume
ISSN
Citations 
abs/1608.07307
1550-3607
0
PageRank 
References 
Authors
0.34
16
3
Name
Order
Citations
PageRank
Arvind Chakrapani100.34
Robert A. Malaney240137.72
Jinhong Yuan300.34