| The LTE is the biggest new technology start-up research and devel-opment project, is seen as the next generation of mobile communication system IMT-Advanced the starting point of the development. LTE for future communication technology will have a proofund impact on the market, is one of the best mobile broadband technology; Will enhance the user experience of mobile communicateons business, make whole healthy and stable development of the communication industry.This paper first two of LTE key technology OFDM and multiplein-put multiple-output (MIMO) system is analyzed theoretically, the detailed description of the OFDM multiple-input multiple-output (MIMO) system and the basic principle and main key technologies, and through the simu-lation modeling mapped the OFDM spectrum diagram, analyzes the ad-vantages of OFDM, at the same time use channel capacity theory vali-dates the MIMO antenna technology for more than the performance of the channel capacity to ascend, and will combine MIMO OFDM and estab-lish mimo-ofdm system model.In the above theory research and system based on the model, and then we study the channel estimation theory, this paper adopted in the sending end insert lead frequency way to estimate the chan-nel frequency response, judge channel, and to receive data signal c-orrection, here are used for the variety of channel estimation algorit hm estimated channel, and use of Matlab software simulation analys is of the performance of the algorithm is compared channel and, at the same time, the frequency interval to the different effect the p-erformance of the system. To comb the way of frequency channel estimation, not only n-eed to guide frequency information, and at the same time also need through the interpolation access to the guide frequency of informa-tion, this article proposes three interpolation algorithm analysis, the simulation compares the advantages and disadvantages of different interpolation algorithm in the practical process of the feasibility. |
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