MIMO Channel Models And Spatial Correlation Analysis

MIMO (Multiple Input Multiple Output) technology can significantly improve the performance of future wireless communication systems. Foshchini and Gasn first put MIMO system and trigger an extensive study. Some theoretical studies the performance of MIMO systems. In particular relevance to the receiving antenna. In fact, the antenna expansion of distance and angle to the wave of smaller, and the antenna mutual coupling is strong, its relevance can not be ignored. An antenna to receive signals directly related to sexual diversity gain resulted in reduced efficiency and access. Miniature mobile terminal also more difficult to implement spatial diversity. Theory and experiment also confirmed relevance to the wave signal arrival angle and the angle to the expansion wave.In this paper, based on the relevance of MIMO channel modeling method, the calculation formula of the correlation coefficients between the antenna. 3GPP TR25．996 agreement reached with the same result; MIMO multi-antenna wireless deduced scattered in space-related closure of the Channel analytical, Numerical analysis to compare the relationship between power spectral wave angle, MIMO constitute an accurate analysis of system performance and design of MIMO antenna system; Finally, the channel model used in HSDPA physical link-level simulation, obtained under the conditions of the performance of various channels.The results show that : the main factors affecting the correlation between antennas including antenna spacing The starting signal DOA or AOA, the angle of extension (AS), angular power spectrum (PAS); the relationship between antenna wireless link performance to a greater impact in the larger correlation coefficient circumstances, Multiple collected less than the throughput of a single admission alone. Reduce the angle of expansion slowed down so that the correlation coefficient with the antenna spacing; The correlation coefficient between the mutual coupling unit makes volatility In small angle expansion, the correlation coefficient increased arrival makes decreased; From the point of view of reduced relevance, MIMO multi-antenna modules designed spacing is large enough, small enough mutual coupling. Azimuth possible to receive full coverage to all the scattering wave. The numerical results show a visual communications antenna characteristics and the environmental impact related to airspace...