A SIMPLE BIT LOADING ALGORITHM FOR LONG TERM EVOLUTION-ADVANCED VEHICULAR CHANNEL

Abstract

Increasing demand for energy efficient cellular networks has prompted considerable research on the topic green
communication. Bit loading is a technique used in multicarrier communication systems like orthogonal frequency division
multiplexing (OFDM) to assign bits efficiently based on the subchannel quality. In adaptive bit loading (ABL), the number of
bits that can be transmitted in each subcarrier is determined by the signal to noise ratio (SNR) of the subcarrier. Margin adaptive
(MA) algorithm is utilized to minimize the total transmitted energy. In this work, a simple bit loading algorithm (SBL) is
proposed for a long-term evolution- advanced (LTE-A) vehicular channel to minimize the total energy required to transmit the
target bits. Compared to other algorithms, SBL algorithm is less complex and convergent to the optimal solution in one iteration.
The simulation results also prove that the algorithm minimizes computational complexity.