System Performance Evaluation of Fixed and Adaptive Resource Allocation of 3GPPLTE Downlink Interface Air

Abstract

The allocation strategies employed in assigning the subcarriers will affect the system performance in various ways such as data rate, power efficiency, spectrum efficiency and bandwidth flexibility. The study investigated the effect of two main assignment strategies which include fixed subcarrier allocation and dynamic subcarrier allocation on the performance of OFDM system. The objective of this study is to determine allocation algorithm that will optimise the available resources. Simulation results show that an adaptive subcarrier allocation based on user channel quality information perform better and optimise the network than fixed allocation.

Key words: OFDM, Spectrum efficiency,