Performance Evaluation of Dual-Polarized MIMO Ultra-Multilevel OFDM Using NU-QAM under Mobile Reception

Abstract

Dual-polarized MIMO and ultra-multilevel OFDM is proposed for next-generation digital terrestrial broadcasting. Also, the use of NU-QAM as a new modulation scheme is considered. In the mobile reception of OFDM signal, inter-carrier interference(ICI) is generated by Doppler-spread. The reception characteristics are deteriorated by ICI, the improving scheme of reception characteristics is necessary. In the MIMO-ICI cancellers with complexity reduction scheme and iterative detection scheme are adopted to improve reception characteristics. In this paper, the reception characteristics are evaluated for dual-polarized MIMO ultra-multilevel OFDM using NU-QAM under mobile reception. As, the results of computer simulations, it is possible to improve reception characteristics of dual-polarized MIMO ultra-multilevel OFDM using NU-QAM.