Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection
Non-orthogonal multiple access (NOMA) is a promising spectrally-efficient technology to satisfy the massive data requirement of the next-generation wireless communication networks. In this paper, we consider cooperative non-orthogonal multiple access (CNOMA) networks with relaying user selection, wh...
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doaj-e905764a564640cea51e2f7a2b7bb72a2021-03-30T02:34:50ZengIEEEIEEE Access2169-35362020-01-01811792111793110.1109/ACCESS.2020.29958759097178Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User SelectionXuesong Liang0https://orcid.org/0000-0002-3647-2638Yongpeng Wu1https://orcid.org/0000-0003-1716-1882Derrick Wing Kwan Ng2https://orcid.org/0000-0001-6400-712XShi Jin3Yingbiao Yao4https://orcid.org/0000-0001-7946-6070Tao Hong5School of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaDepartment of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, ChinaSchool of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, AustraliaNational Mobile Communications Research Laboratory, Southeast University, Nanjing, ChinaSchool of Communication Engineering, Hangzhou Dianzi University, Hangzhou, ChinaSchool of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, ChinaNon-orthogonal multiple access (NOMA) is a promising spectrally-efficient technology to satisfy the massive data requirement of the next-generation wireless communication networks. In this paper, we consider cooperative non-orthogonal multiple access (CNOMA) networks with relaying user selection, where a two-stage user selection scheme is adopted to optimize the received signal-to-noise ratio (SNR) of the weak user. We derive analytical expressions of the outage probability of the CNOMA users under two different types of channel estimation errors. Afterwards, we investigate the asymptotic characteristics the outage probability of the CNOMA systems in the high SNR regimes. Our results show that for the case of constant variance of the channel estimation error, the outage probability of each user is saturated and cannot be improved by increasing the transmit power of the access point. In contrast, there is no performance bottleneck of the outage probability for all the users when the variance of the channel estimation errors decease with SNR, whilst fully diversity gain is achieved by the weak user.https://ieeexplore.ieee.org/document/9097178/Cooperative non-orthogonal multiple accessoutage probabilitychannel estimation erroruser selection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xuesong Liang Yongpeng Wu Derrick Wing Kwan Ng Shi Jin Yingbiao Yao Tao Hong |
spellingShingle |
Xuesong Liang Yongpeng Wu Derrick Wing Kwan Ng Shi Jin Yingbiao Yao Tao Hong Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection IEEE Access Cooperative non-orthogonal multiple access outage probability channel estimation error user selection |
author_facet |
Xuesong Liang Yongpeng Wu Derrick Wing Kwan Ng Shi Jin Yingbiao Yao Tao Hong |
author_sort |
Xuesong Liang |
title |
Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection |
title_short |
Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection |
title_full |
Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection |
title_fullStr |
Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection |
title_full_unstemmed |
Outage Probability of Cooperative NOMA Networks Under Imperfect CSI With User Selection |
title_sort |
outage probability of cooperative noma networks under imperfect csi with user selection |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2020-01-01 |
description |
Non-orthogonal multiple access (NOMA) is a promising spectrally-efficient technology to satisfy the massive data requirement of the next-generation wireless communication networks. In this paper, we consider cooperative non-orthogonal multiple access (CNOMA) networks with relaying user selection, where a two-stage user selection scheme is adopted to optimize the received signal-to-noise ratio (SNR) of the weak user. We derive analytical expressions of the outage probability of the CNOMA users under two different types of channel estimation errors. Afterwards, we investigate the asymptotic characteristics the outage probability of the CNOMA systems in the high SNR regimes. Our results show that for the case of constant variance of the channel estimation error, the outage probability of each user is saturated and cannot be improved by increasing the transmit power of the access point. In contrast, there is no performance bottleneck of the outage probability for all the users when the variance of the channel estimation errors decease with SNR, whilst fully diversity gain is achieved by the weak user. |
topic |
Cooperative non-orthogonal multiple access outage probability channel estimation error user selection |
url |
https://ieeexplore.ieee.org/document/9097178/ |
work_keys_str_mv |
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1724185018478100480 |