Abstract
The paper proposes a method for scheduling frequency and power resources between users to ensure equal throughput in the downlink channel when non-orthogonal multiplexing of users in power domain of orthogonal subcarriers (PD-NOMA/OFDMA). This method allows the multiplexing of several user signals with different power in a single frequency-time segment. The existing approaches to resource scheduling are based on the use of ideal signal-code sequences with perfect noise immunity characteristics. This does not allow an accurate estimate of the PD-NOMA system throughput in real operating conditions. To solve this problem, it is necessary to design a new method of power scheduling that takes into account the type and characteristics of real modulation and coding scheme (MCS). The novelty of the paper is to take into account currently used MCS’s based on QAM modulation and LDPC coding in power scheduling. A designed scheduling method is using strategy of achieve equal throughput of users and maximize system throughput. To estimate the PD-NOMA system throughput using the proposed methods, a simulation model of the PD-NOMA/OFDMA system’s downlink channel has been developed. The average throughput gain of the PD-NOMA/OFDMA system relative to OFDMA was 19% over 100 simulation iterations #CSOC1120.
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The work is supported by the Russian Science Foundation grant. Project number 19-79-00087.
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Kryukov, Y.V., Pokamestov, D.A., Brovkin, A.A., Rogozhnikov, E.V. (2020). Power and Frequency Scheduling Using Equal Throughput Strategy in PD-NOMA Systems. In: Silhavy, R. (eds) Applied Informatics and Cybernetics in Intelligent Systems. CSOC 2020. Advances in Intelligent Systems and Computing, vol 1226. Springer, Cham. https://doi.org/10.1007/978-3-030-51974-2_54
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DOI: https://doi.org/10.1007/978-3-030-51974-2_54
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