Modeling And Research On 3D Space-time Multi-antenna Wireless Channel

Currently, the multi-antenna MIMO(Multiple Input Multiple Output) technology in wideband wireless transmission has been an extensively developed technique in the field of wireless communication. A wireless mobile environment adopting MIMO technology, which can increase the channel capacity of the system without increasing the bandwidth and transmit power. However, the improvement of the performance of MIMO systems depends strongly on the characteristics of the MIMO channel. Therefore, it is particularly fundamental to establish an accurate channel model that can precisely describing the characteristics of MIMO channel.Those current MIMO channel models in industry are mostly based on the two-dimensional plane, the statistical characteristics of angle of whose research aspects could only cover the azimuth, ignoring the component of elevation angle, which could not reflect the actual radio channel.In order to accurately reflect the transmission essence of the MIMO channel, basing on the mainstream geometry of two-dimensional random channel model in industry—the WINNER II channel model,the paper expands its 3D MIMO channel model version, which realizes the 3D extension of the channel together with antenna model, truly describing the actual characteristics of the MIMO channel. The paper completes the 3D extension from the following aspects:1. Realizing the estimation of the key parameters of the wireless channel which can describe the characteristics(delay, angle of departure, angle of arrival, Doppler frequency, polarization magnitude). Expanding the 3D precise estimation of the component of elevation of angle of departure and arrival.2. Realizing the 3D modeling for the antenna array of arbitrary placement, proposing "A 3D Polarization Projection Algorithm for WINNER Channel Simulation",which could generate the key parameters through theoretical derivation(the horizontal and vertical antenna field pattern) for the modeling of the WINNER channel, which can effectively reduce the cost to obtain the characteristic parameters of the channel. Based on this work, we complete the 3D modeling of antenna array.3. Realizing the 3D expansion of GCM of WINNER channel model which bases on MIMO. WINNER II channel model can be applied to wireless communication systems for link-level and system-level performance evaluation. However, the current GCM could only be achieved within the two-dimensional plane, in order tomore precisely reflect the actual MIMO channel characteristics, the paper builds the model for GCM within the three-dimensional space following by some relevant simulations for channel capacity of 3D WINNER channel model.4. Providing the parameter calibration simulation for the newly-built 3D channel model and statistics that could describe the channel characteristics.