Investigating the reduction of complexity of existing algorithms and methods in allocating radio resources and channels in OFDMA

Subject Areas : Electronics Engineering

Mojtaba Ghasemi Amineh ¹ , Aliasghar Haghighi ²

1 - Islamic Azad University, Shahr-e-Majlesi Branch
2 - Islamic Azad University, Shahr-e-Majlesi Branch

Received: 2021-04-27 Accepted : 2021-04-27 Published : 2019-07-23

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Abstract :

This paper allocates subcarriers and power to each OFDMA user to minimize total user data rates due to overall power constraints, bit error rates, and proportionality between user data rates. Here we propose a non-duplicate method that makes our user rate possible by releasing severe fit constraints. This method is less complex than existing methods and gives us more user data simulation. In this article, by developing a subcarrier allocation scheme that makes the power allocation problem linear and expresses the approximate proportionality of the data, it extends the power allocation problem to a solution for simultaneous linear equations and simulates the results of the allocation algorithm. The proposed achieves an overall capacity that is less inconsistent than the previous method and significantly reduces computations while achieving acceptable data fit.