Implementation issues of adaptive OFDM in mobile radio environment

Abstract

A review of adaptive modulation with other related issues as part of link adaptation in an OFDM system is presented. Issues such as channel estimation, channel coding, Multiple Input and Multiple Output (MIMO) system are discussed as efforts in increasing throughput and reducing Bit Error Rate (BER). Significant works related to the issues are reviewed in details while others are summarized and tabulated for comparison purposes. Other potent issues that require further considerations in implementing adaptive OFDM system such as channel state information metrics, subband adaptation and adaptive antennas are presented and discussed as current and future direction of research in this area.