Premium
Achieving maximum bit rate in a cognitive radio network with physical layer network coding
Author(s) -
Khosroazad Somayeh,
Abedi Ali,
Neda Naaser
Publication year - 2018
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3558
Subject(s) - computer science , linear network coding , relay , physical layer , cognitive radio , computer network , throughput , transmission (telecommunications) , coding (social sciences) , multiplexing , power (physics) , telecommunications , wireless , mathematics , statistics , physics , quantum mechanics , network packet
Summary In this paper, the power allocation problem in a relay‐assisted cognitive radio network (CRN) is considered where the secondary users exchange information in an interweave mode on the basis of physical layer network coding. In order to enhance the capacity of CRN, using multiple‐input multiple‐output and orthogonal frequency division multiplexing has become very popular in the literature. This paper goes one step further to improve the throughput of secondary users using physical layer network coding by drawing off the transmission time. The main goal is to maximize the capacity of CRN, while keeping the total interference imposed on the primary users under a certain threshold. An optimal solution to this power allocation problem with limited relay power constraint, due to the limited budget, is derived; however, because of the high complexity of this method, an efficient suboptimal solution is also proposed.