TY - JOUR
T1 - NOMA Receiver Design for Delay-Sensitive Systems
AU - Assaf, Tasneem
AU - Al-Dweik, Arafat
AU - Moursi, Mohamed S.El
AU - Zeineldin, Hatem
AU - Al-Jarrah, Mohammad
N1 - Funding Information:
This work was supported by Khalifa University under the flagship project entitled "MUSES: Multiuse Space Energy Systems" underGrant 8474000026. The work of Arafat Al-Dweik was supported by the KU Center for Cyber-Physical Systems under Grant C2PS-T2
Publisher Copyright:
© 2007-2012 IEEE.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Successive interference cancelation (SIC) has been considered widely for the detection of downlink nonorthogonal multiple access (NOMA) signals. However, the sequential detection inherent to SIC process may introduce additional time delay for certain users, making the SIC unsuitable for communication systems with time delay constraints such as wireless networks that utilize unmanned aerial vehicles or low earth orbit satellites. Therefore, this article considers the performance of NOMA systems using a joint multiuser detector (JMuD), which can detect the signals of all users simultaneously and, hence, reduce the detection time requirements. The performance of the JMuD is evaluated in terms of bit error rate (BER), computational complexity, and processing time and compared to the SIC detector (SICD). The exact BER of the JMuD is derived analytically using quadrature phase shift keying modulation where closed-form expressions are derived for the two- and three-user scenarios for the air-to-ground channel, which is modeled as a Rician fading channels with order statistics. The obtained analytical results corroborated by Monte Carlo simulation confirm that the BERs of the JMuD and SICD are identical; however, the processing time of the SICD is 51% more than the JMuD for several cases of interest.
AB - Successive interference cancelation (SIC) has been considered widely for the detection of downlink nonorthogonal multiple access (NOMA) signals. However, the sequential detection inherent to SIC process may introduce additional time delay for certain users, making the SIC unsuitable for communication systems with time delay constraints such as wireless networks that utilize unmanned aerial vehicles or low earth orbit satellites. Therefore, this article considers the performance of NOMA systems using a joint multiuser detector (JMuD), which can detect the signals of all users simultaneously and, hence, reduce the detection time requirements. The performance of the JMuD is evaluated in terms of bit error rate (BER), computational complexity, and processing time and compared to the SIC detector (SICD). The exact BER of the JMuD is derived analytically using quadrature phase shift keying modulation where closed-form expressions are derived for the two- and three-user scenarios for the air-to-ground channel, which is modeled as a Rician fading channels with order statistics. The obtained analytical results corroborated by Monte Carlo simulation confirm that the BERs of the JMuD and SICD are identical; however, the processing time of the SICD is 51% more than the JMuD for several cases of interest.
KW - Bit error rate (BER)
KW - joint detection
KW - maximum likelihood detection (MLD)
KW - nonorthogonal multiple access (NOMA)
KW - successive interference cancelation (SIC)
UR - http://www.scopus.com/inward/record.url?scp=85096830257&partnerID=8YFLogxK
U2 - 10.1109/JSYST.2020.3032878
DO - 10.1109/JSYST.2020.3032878
M3 - Article
AN - SCOPUS:85096830257
SN - 1932-8184
VL - 15
SP - 5606
EP - 5617
JO - IEEE Systems Journal
JF - IEEE Systems Journal
IS - 4
ER -