Performance Analysis of NOMA Multicast Systems Based on Rateless Codes With Delay Constraints

To achieve an efficient and reliable data transmission in time-varying conditions, a novel non-orthogonal multiple access (NOMA) transmission scheme based on rateless codes (NOMA-RC) is proposed in the multicast system in this paper. Using rateless codes at the packet level, the system can generate...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2021-08, Vol.20 (8), p.5003-5017
Main Authors: Hu, Yingmeng, Liu, Rongke, Kaushik, Aryan, Thompson, John
Format: Article
Language:English
Subjects:
Data transmission
Decoding
delay constraints
Delays
Multicast system
Multicasting
NOMA
Nonorthogonal multiple access
Optimization
Packets (communication)
rateless codes
Reactive power
Relays
Resource management
Throughput
User requirements
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Summary:To achieve an efficient and reliable data transmission in time-varying conditions, a novel non-orthogonal multiple access (NOMA) transmission scheme based on rateless codes (NOMA-RC) is proposed in the multicast system in this paper. Using rateless codes at the packet level, the system can generate enough encoded data packets according to users' requirements to cope with adverse environments. The performance of the NOMA-RC multicast system with delay constraints is analyzed over Rayleigh fading channels. The closed-form expressions for the frame error ratio and the average transmission time are derived for two cases which are a broadcast communication scenario (Scenario 1) and a relay communication scenario (Scenario 2). Under the condition that the quality of service for the edge user is satisfied, an optimization model of power allocation is established to maximize the sum rate. Simulation results show that Scenario 2 can provide better block error ratio performance and exhibit less transmission time than Scenario 1. When compared with orthogonal multiple access (OMA) with rateless codes system, the proposed system can save on the transmission time and improve the system throughput.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2021.3064524