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On the capacity of asynchronous cooperative NOMA in multibeam satellite systems

On the capacity of asynchronous cooperative NOMA in multibeam satellite systems

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Advances in Communications Satellite Systems Proceedings of The 36th International Communications Satellite Systems Conference (ICSSC-2018) — Recommend this title to your library

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In this paper, we investigate the effect of asynchronous reception in multibeam satellite system forward link using our previously proposed cooperative non-orthogonal multiple access (NOMA) technique. Our proposed system is in a dense frequency reuse scheme and based on the cooperation of transmitting beams by targeting one user terminal at a time. The jointly reception of data streams features multiple access channel (MAC), where both data will be recovered by devising successive interference cancellation (SIC). Herein paper we show that in case of asynchronous reception, the propagation of errors through SIC causes huge loss of data frames and throughput degradation. Hence, we propose the channel model of the asynchronous NOMA, and we investigate the system's capacity region, where the information theoretic results show that the asynchronous reception of the data streams can indeed improve the sum-rate upper bounds.

Inspec keywords: radiofrequency interference; cooperative communication; multi-access systems; channel capacity; diversity reception; interference suppression; wireless channels; MIMO communication; telecommunication network reliability

Other keywords: multibeam satellite system forward link; asynchronous cooperative noma; dense frequency reuse scheme; data streams features; jointly reception; asynchronous NOMA; successive interference cancellation; multiple access channel; nonorthogonal multiple access technique; data frames; multibeam satellite systems; asynchronous reception

Subjects: Radio links and equipment; Other topics in statistics; Mobile radio systems; Multiple access communication; Reliability; Electromagnetic compatibility and interference

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