Abstract
A successive interference cancellation receiver is one of the important blocks in non-orthogonal multiple access (NOMA) transmission. The quality of detection of the strongest user signals often decides about the quality of the whole system and minimizes the error propagation effect. In this paper, we propose an improved detection algorithm, which allows for using the NOMA transmission in a much smaller range of power differences between the terminals sharing common radio resources in the uplink, as compared with standard successive cancellation. The idea lies in the application of tentative decisions about weaker signals in the detection of stronger ones and then, after improved detection of stronger user signals, achieving more reliable decisions about the weaker ones. The simulation results reported in the paper confirm our idea, showing a much higher detection quality of the proposed receiver when compared with the standard solution.
Highlights
A wireless communication system is based on the orthogonality principle which ensures an assigned portion of frequency, time, or code resources for the exclusive use of a particular link between a terminal and a base station, between a terminal and an access point or between two terminals (as in the case of Device-to-Device (D2D) communications)
High demands on traffic volume and data rates set by 5G system requirements [1] in the presence of very limited spectral resources caused a serious interest in loosening the assumptions about the orthogonality of the used resources, resulting in introducing Non-Orthogonal Multiple Access (NOMA) [2]–[5] and simultaneous use of the same resource units by more than one link
SIMULATION RESULTS We have checked the quality of the proposed Successive Interference Cancellation (SIC) detection algorithm on the example of a standard IEEE 802.11a system based on the WiFi model analyzed in [12]
Summary
A wireless communication system is based on the orthogonality principle which ensures an assigned portion of frequency, time, or code resources for the exclusive use of a particular link between a terminal and a base station, between a terminal and an access point or between two terminals (as in the case of Device-to-Device (D2D) communications). High demands on traffic volume and data rates set by 5G system requirements [1] in the presence of very limited spectral resources caused a serious interest in loosening the assumptions about the orthogonality of the used resources, resulting in introducing Non-Orthogonal Multiple Access (NOMA) [2]–[5] and simultaneous use of the same resource units by more than one link. It is one of the techniques considered for application in 5G wireless communication systems it was already proposed for the 4th generation LTE-Advanced system. It is under consideration for 3GPP Release 16 standards of
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
