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Power allocation for downlink multiuser hybrid NOMA‐OMA systems: An auction game approach
Author(s) -
Lamba Amanjot Kaur,
Kumar Ravi,
Sharma Sanjay
Publication year - 2020
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.4306
Subject(s) - telecommunications link , computer science , noma , base station , mathematical optimization , key (lock) , transmitter power output , nash equilibrium , game theory , cellular network , channel (broadcasting) , power (physics) , computer network , computer security , mathematics , mathematical economics , transmitter , physics , quantum mechanics
Summary Nonorthogonal multiple access (NOMA) is viewed as one of the key enabling candidate for the fifth‐generation systems. The effectiveness of such networks heavily relies on the power allocation. This paper addresses the problem of power allocation in a downlink multiuser hybrid NOMA‐orthogonal multiple access (OMA) network, where NOMA is integrated into OMA. Users with strong channel conditions are paired up with the users having weak channel conditions based on a random mechanism. Further, user pairs compete in an auction game for the transmit power being sold by the base station. Bids are placed iteratively by each user pair such that it maximizes their own utility. The existence of a unique Nash equilibrium has been proved theoretically. Simulation results show that the proposed scheme achieves higher average sum rate of users in comparison with that of the existing algorithms.