Optimal Power Allocation for LTE Users with Different Modulations

TL;DR

This paper presents an optimal power allocation method for LTE users employing various modulation schemes, utilizing utility functions and LM optimization to improve data transmission efficiency based on CQI feedback.

Contribution

It introduces a novel approach combining utility functions and Levenberg-Marquardt optimization for power allocation across different LTE modulation schemes.

Findings

Optimal power allocation improves data rates for LTE users.

Utility functions accurately model success probabilities for different modulations.

Simulation results validate the effectiveness of the proposed algorithm.

Abstract

In this paper, we demonstrate the optimal power allocation for QPSK, 16-QAM, and 64-QAM modulation schedules and the role of channel quality indicator (CQI). We used sigmoidal-like utility functions to represent the probability of successful reception of packets at user equipment (UE). CQI as a feedback to the base station (BS) indicates the data rate that a downlink channel can support. With Levenberg-Marquardt (LM) Optimization method, we present utility functions of different CQI values for standardized 15 Modulation order and Coding Scheme (MCS) in $3^{rd}$ Generation Partnership Project (3GPP). Finally, we simulate and show the results of the optimal power allocation algorithm.