So sánh mô hình kênh 3GPP và mô hình kênh vòng tròn trong hệ thống kênh tương quan MIMO-OFDMA

• Ngôn ngữ: vie
• Ký hiệu phân loại: 511.8 Mathematical models (Mathematical simulation)
• Thông tin xuất bản: Khoa học và Công nghệ các trường đại học kỹ thuật, 2014
• Mô tả vật lý: 43-49
• Bộ sưu tập: Metadata
• ID: 506622

Tóm tắt

This paper investigates the performance of the multi input multi output orthogonal frequency division multiplexing access (MIMO-OFDMA) system in two geometrical stochastic and correlation stochastic models. Performance symbol error rate (SER) of MIMO systems in realistic radio environments greatly depends on the spatial correlation because of the fading or cluster of scatterers in the multipath propagation environments. It is assumed that all antennas have same radiation pattem and the spatial correlation depends on the position of an antenna arrays. The SER performance results are depend on the correlation ratio of the channel. The number of users in MAC frames is also calculated in the system. Based on an algorithm of Vertical Bell Laboratories Layered Space Time (V-BLAST), a successive cancellation method applied to the receiver the authors obtain the high SNR in correlation channel. the results are simulated on both of the Extended One-Ring channel model and the Spatial Correlation Model (SCM) based on long term evolution (LTE) standard for 2x2 MIMO-OFDMA system.