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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Performance analysis for optimum transmission and comparison with maximal ratio transmission for MIMO systems with cochannel interference | Lin EURASIP Journal on Wireless Communications and Networking 2011 2011 89 http jwcn.eurasipjournals.eom content 2011 1 89 o EURASIP Journal on Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Performance analysis for optimum transmission and comparison with maximal ratio transmission for MIMO systems with cochannel interference Sheng-Chou Lin Abstract This article presents the performance analysis of multiple-input multiple-output MIMO systems with quadrature amplitude modulation QAM transmission in the presence of cochannel interference CCI in nonfading and flat Rayleigh fading environments. The use of optimum transmission OT and maximum ratio transmission MRT is considered and compared. In addition to determining precise results for the performance of QAM in the presence of CCI it is our another aim in this article to examine the validity of the Gaussian interference model in the MRT-based systems. Nyquist pulse shaping and the effects of cross-channel intersymbol interference produced by CCI due to random symbol of the interfering signals are considered in the precise interference model. The error probability for each fading channel is estimated fast and accurately using Gauss quadrature rules which can approximate the probability density function pdf of the output residual interference. The results of this article indicate that Gaussian interference model may overestimate the effects of interference particularly for high-order MRT-based MIMO systems over fading channels. In addition OT cannot always outperform MRT due to the significant noise enhancement when OT intends to cancel CCI depending on the combination of the antennas at the transmitter and the receiver number of interference and the statistical characteristics of the channel. Keywords multiple-input multiple-output MIMO cochannel interference CCI maximum ratio transmission MRT optimum transmission OT intersymbol interference ISI Gauss quadrature rules GQR 1. .
