Abstract
With the rapid development of land mobile satellite (LMS) systems, large scale sensors and devices are willing to request wireless services, which is a challenge to the quality of service requirement and spectrum resources utilization on onboard LMS systems. Under this situation, the non-orthogonal multiple access (NOMA) is regarded as a promising technology for improving spectrum efficiency of LMS systems. In this paper, we analyze the ergodic capacity (EC) of NOMA-based multi-antenna LMS systems in the presence of imperfect limitations, i.e., channel estimation errors, imperfect successive interference cancellation, and co-channel interference. By considering multiple antennas at the satellite and terrestrial sensor users, the closed-form expression for EC of the NOMA-based LMS systems with imperfect limitations is obtained. Monte Carlo simulations are provided to verify theoretical results and reveal the influence of key parameters on system performance.
Highlights
Before investigating the detailed performance of the considered system, we first obtain the statistical characteristics of the different links in the non-orthogonal multiple access (NOMA)-assisted multi-antenna
We provide MC simulations to validate the performance of NOMAbased multi-antenna land mobile satellite (LMS) systems under different situations
As the values of L and σ become larger, the channel estimation errors (CEEs) of the NOMAbased LMS networks become smaller, which results in improved ergodic capacity (EC)
Summary
With the rapid development and significant demand of Internet of Things (IoT), telemedicine, Internet of Vehicles (IoV), and other technologies, land mobile satellite (LMS) systems have received tremendous attention from both academic and industry areas [1,2,3]. In [34], the authors evaluated the impacts of CCI on the LMS systems from the perspective of ergodic capacity (EC), OP, average symbol error rate (ASER), and energy efficiency (EE), respectively Motivated by these obervations, to the best of our knowledge, the ergodic capacity of the NOMA-based LMS systems with imperfect limitations, i.e., CEEs, imperfect SIC, and CCI, has not been investigated. The analytical expression for EC of considered NOMA-based LMS systems is derived to evaluate the impacts of imperfect limitations on the performance of considered system. G m,n p,q (·|· ) indicates Meijer-G function ([35], Eq 9.301)
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