Performance Enhancement in Digital Mobile Satellite Using SC-FDMA with MIMO

Abstract

Single carrier frequency division multiple accessing (SC-FDMA) technique is one of the good generation modulation techniques for uplink transmission in wireless communication system. It promises to deliver high throughput, low bit error rate, high spectral efficiency with low peak to average power ratio (PAPR) than the orthogonal frequency division multiple accessing (OFDMA) technique. In this thesis mathematical modelling and Matlab simulation are carried out to obtain PAPR performance for different modulation formats and number of subcarriers for SC-FDMA technique. The methodology use complete digital MIMO demonstrator, the first of its kind, allows in-depth verification and optimization of the MIMO techniques applied to satellite broadcasting networks. Moreover, the demonstrator allows complementing and confirming the theoretical and our simulation-based. It is shown that dual polarization MIMO diversity is able to provide remarkable gains in terms of satellite/terrestrial transmit power reduction and/or capacity increase compared to more conventional non MIMO solutions. It is also demonstrated that the adoption of a relatively simple spatial multiplexing MIMO technique represents the best way to grasp these gains.