Power allocation schemes for wireless powered NOMA systems with imperfect CSI: An application in multiple antenna–based relay

Summary The simultaneous wireless information and power transfer or energy harvesting (EH) can be combined in nonorthogonal multiple access (NOMA) as green applications towards 5G. This paper investigates a new cooperative EH‐NOMA protocol, where the intermediate relay has not equipped the fixed pow...

Full description

Saved in:
Bibliographic Details
Published in:International journal of communication systems 2018-10, Vol.31 (15), p.n/a
Main Authors: Nguyen, Thanh‐Luan, Do, Dinh‐Thuan
Format: Article
Language:English
Subjects:
Computer simulation
Energy harvesting
imperfect channel state information
NOMA
Nonorthogonal multiple access
outage probability
Power management
Power transfer
Relay
Signal transmission
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary The simultaneous wireless information and power transfer or energy harvesting (EH) can be combined in nonorthogonal multiple access (NOMA) as green applications towards 5G. This paper investigates a new cooperative EH‐NOMA protocol, where the intermediate relay has not equipped the fixed power source and acts as a wireless powered relay to help signal transmission to representative weak user and strong user in NOMA. However, impacts of imperfect channel estimation contribute to outage system performance evaluations. We formulate the power resource assignment paradigms as two schemes, namely, fixed power allocation and dynamic power allocation, by considering imperfect channel state information (CSI). To solve this problem, we derive the closed‐form expressions of outage probability under imperfect CSI and the power allocation constraints. The expected numerical results related to the derived expressions for the outage probability are examined that numerical and the Monte Carlo simulations are strictly matching lines. In this paper, a new cooperative EH‐NOMA protocol is investigated. In particular, the intermediate relay has not equipped the fixed power source and deploys as a wireless powered relay to assistance signal transmission to representative weak user and strong user in NOMA. However, impacts of imperfect channel estimation contribute to outage system performance evaluations. We formulate the power resource assignment paradigms as two schemes, namely, fixed power allocation (F‐PA) and dynamic power allocation (D‐PA).
ISSN:1074-5351
1099-1131
DOI:10.1002/dac.3789