An Analysis of Link Adaptation Algorithm based On Link Quality Metrics for IEEE 802.16 Systems

Abstract

The combination of multiple antennas and multicarrier code division multiple access (MC-CDMA) is a strong candidate for the downlink of future mobile communications. The study of such systems, in scenarios that model real-life transmissions is an additional step towards an optimised achievement. Channel estimation is employed to improve its performance by characterising the channel. In this paper turbo aided iterative channel estimation (ICE) technique is proposed for orthogonal space-time block coded (STBC) MC-CDMA systems with multiple-input multiple-output (MIMO) channel in the downlink. Simulations with a realistic outdoor MIMO channel model, over a wide range of data rates shows that turbo aided ICE outperforms ICE.