Finite SNR Diversity-Multiplexing Trade-Off in Hybrid ABCom/RCom-Assisted NOMA Networks

The upcoming sixth generation (6G) driven Internet-of-Things (IoT) will face the great challenges of extremely low power demand, high transmission reliability and massive connectivities. To meet these requirements, we propose a novel hybrid ambient backscatter communication (ABCom) or relay communic...

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Bibliographic Details
Published in:IEEE transactions on mobile computing 2024-10, Vol.23 (10), p.9108-9119
Main Authors: Li, Xingwang, Zheng, Yike, Zhang, Jianhua, Dang, Shuping, Nallanathan, Arumugam, Mumtaz, Shahid
Format: Magazinearticle
Language:English
Subjects:
Ambient backscatter communication
Backscatter
diversity-multiplexing trade-off
MIMO communication
Multiplexing
NOMA
non-orthogonal multiple access
outage probability
Relays
Reliability
Signal to noise ratio
two-way cooperative relaying
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Summary:The upcoming sixth generation (6G) driven Internet-of-Things (IoT) will face the great challenges of extremely low power demand, high transmission reliability and massive connectivities. To meet these requirements, we propose a novel hybrid ambient backscatter communication (ABCom) or relay communication (RCom) assisted non-orthogonal multiple access (NOMA) network , which simultaneously enables traditional relay networks and ABCom-assisted IoT networks. Specifically, we investigate the reliability and the finite signal-to-noise ratio (SNR) diversity-multiplexing trade-off (f-DMT) of the proposed system to characterize the outage performance of the proposed system in the non-asymptotic SNR region. We derive the outage probability (OP) and the finite SNR diversity gain when two sources aim to communicate through either ABCom or RCom. On the basis that the results of Monte Carlo simulation and analysis are in perfect agreement, we discover that in the high SNR regime, the OP for ABCom tends to be a constant, leading to a zero diversity gain and an error floor, while the OP for RCom is monotone decreasing with respect to the SNR. Also, compared with the imperfect successive interference cancellation (ipSIC) mode, the reliability of the system under the ideal condition is significantly improved; Moreover, in the lower multiplexing gain regime, for both ABCom and RCom, the higher finite SNR diversity gain results in better system reliability, which provides good opportunities for ABCom to adapt f-DMT and improve relevant performance metrics by adapting the reflection parameter.
ISSN:1536-1233
1558-0660
DOI:10.1109/TMC.2024.3357753