AWGN and rayleigh fading behavior of the wireless decode-and-forward relay channel with arbitrary time and power allocation

Zarol Fitri Khairol Fauz, Muhammad Zarol Fitri and Elsheikh, Elsheikh Mohamed Ahmed (2018) AWGN and rayleigh fading behavior of the wireless decode-and-forward relay channel with arbitrary time and power allocation. Indonesian Journal of Electrical Engineering and Computer Science, 10 (1). pp. 248-257. ISSN 2502-4752 E-ISSN 2502-4760

	PDF - Published Version Restricted to Repository staff only Download (500kB) | Request a copy
Preview	PDF (SCOPUS) - Supplemental Material Download (495kB) | Preview

Abstract

Relying has in use for decades to tackle some of the challenges of wireless communication such as extending transmitting distance, transmitting over rough terrains. Diversity achieved through relaying is also a means to combat the random behavior of fading channels. In this work, effect of time and power allocation on relay performance is studied. The channel considered is the three-node channel with half-duplex constraint on the relay. The relaying technique assumed is decode-and-forward. Mutual information is used as the criteria to measure channel performance. There is half-duplex constraint and a total transmission power constraint on the relay source node and the relay node. A model is established to analyze the mutual information as a function of time allocation and power allocation in the case of AWGN regime. The model is extended to the Rayleigh fading scenario. In both AWGN and Rayleigh fading, results showed that the importance of relaying is more apparent when more resources are allocated to the relay. It was also shown that quality of the source to destination link has direct impact on the decision to relay or not to relay. Relatively good source to destination channel makes relaying less useful. The opposite is true for the other two links, namely the source to relay channel and the relay to destination channel. When these two channels are good, relaying becomes advantageous. When applied to cellular systems, we concluded that relaying is more beneficial to battery-operated mobile nodes than to base stations.

Item Type:	Article (Journal)
Additional Information:	7119/61621
Uncontrolled Keywords:	Three-node; Cha Decode-and-Forward; Power Allocation; Time Allocation Relaying Mutual Information
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr Elsheikh M. A. Elsheikh
Date Deposited:	30 Jan 2018 12:08
Last Modified:	17 Feb 2020 10:47
URI:	http://irep.iium.edu.my/id/eprint/61621

Actions (login required)

View Item