TY - GEN
T1 - Enhanced Non-Orthogonal Multiple Access Using Data-Aware Power Assignment
AU - Yahya, Hamad
AU - Alsusa, Emad
AU - Al-Dweik, Arafat
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Non-orthogonal multiple access (NOMA) is a promising candidate for future wireless networks due to its ability to improve the spectral-efficiency and network connectivity. Nevertheless, the error rate performance of NOMA depends significantly on the power assignment, which requires accurate knowledge of the channel state information at the transmitter (CSIT). However, providing accurate CSIT can be challenging. Therefore, this paper proposes a data-aware adaptive power assignment NOMA scheme called PANOMA which adaptively changes the signal power based on the transmitted data to maximize the constructive interference. To quantify its potential, closed-form bit error rate (BER) expressions are derived for two users over the broadcast Rayleigh fading channel. Based on these expressions, the power assignment that minimizes the system's average BER is found. The results demonstrate that PANOMA provides a tangible BER performance gain over conventional power-domain NOMA when both schemes use optimal power and sub-optimal power assignments. Also, PANOMA provides robustness to imperfect power assignment which results from imperfect CSIT. The integrity of the analytical results is verified by Monte Carlo simulation.
AB - Non-orthogonal multiple access (NOMA) is a promising candidate for future wireless networks due to its ability to improve the spectral-efficiency and network connectivity. Nevertheless, the error rate performance of NOMA depends significantly on the power assignment, which requires accurate knowledge of the channel state information at the transmitter (CSIT). However, providing accurate CSIT can be challenging. Therefore, this paper proposes a data-aware adaptive power assignment NOMA scheme called PANOMA which adaptively changes the signal power based on the transmitted data to maximize the constructive interference. To quantify its potential, closed-form bit error rate (BER) expressions are derived for two users over the broadcast Rayleigh fading channel. Based on these expressions, the power assignment that minimizes the system's average BER is found. The results demonstrate that PANOMA provides a tangible BER performance gain over conventional power-domain NOMA when both schemes use optimal power and sub-optimal power assignments. Also, PANOMA provides robustness to imperfect power assignment which results from imperfect CSIT. The integrity of the analytical results is verified by Monte Carlo simulation.
KW - Bit error rate (BER)
KW - Constructive interference
KW - Non-orthogonal multiple access (NOMA)
KW - Power assignment
UR - http://www.scopus.com/inward/record.url?scp=85123410949&partnerID=8YFLogxK
U2 - 10.1109/ISNCC52172.2021.9615887
DO - 10.1109/ISNCC52172.2021.9615887
M3 - Conference contribution
AN - SCOPUS:85123410949
T3 - 2021 International Symposium on Networks, Computers and Communications, ISNCC 2021
BT - 2021 International Symposium on Networks, Computers and Communications, ISNCC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 International Symposium on Networks, Computers and Communications, ISNCC 2021
Y2 - 31 October 2021 through 2 November 2021
ER -