3D多天線空時無線信道建模與研究
[Abstract]:At present, multi-antenna MIMO (Multiple Input Multiple Output, (MIMO) in broadband wireless transmission has become a widely studied technology in wireless communication field. In wireless transmission environment, the channel capacity of wireless communication system can be significantly improved by using MIMO technology without increasing the transmission bandwidth and transmission power of the wireless communication system. However, the channel characteristics of MIMO seriously restrict its system performance. Therefore, it is very important to establish a channel model that accurately describes the characteristics of MIMO channel. Most of the existing MIMO channel models in the industry are built in the two-dimensional plane. The spatial angle statistics only considers the azimuth component but neglects the pitch angle component. This model can not reflect the actual wireless channel characteristics. In order to reveal the transmission essence of real MIMO channel accurately, this paper extends the 3D version of MIMO channel model based on WINNER II channel model, which is the main two-dimensional stochastic channel model based on geometry. The 3D model of channel and antenna is realized, and the channel characteristics of actual MIMO are described more realistically. This paper mainly realizes the research of 3D MIMO modeling from the following aspects: 1. The estimation of the key parameters (time delay, arrival angle, dewave angle, Doppler frequency, polarization amplitude) describing the space, time and frequency characteristics of wireless space channel is realized. The 3D estimation of spatial angle is extended to realize the accurate estimation of pitch dimension of wave angle and wave angle. 2. The 3D modeling of antenna array with arbitrary placement in space is realized, and a 3D polarization projection algorithm in WINNER channel simulation is proposed. The algorithm can generate the key parameters (horizontal and vertical antenna field pattern) needed for constructing the WINNER channel model by theoretical derivation, thus effectively reducing the cost of obtaining the characteristic parameters of the actual channel description. Based on this, the 3D modeling of antenna array is carried out. 3. The WINNER general channel model based on MIMO (3D extended. WINNER II channel model of GCM,Generic Channel Model) is implemented to evaluate the link level and system level performance of wireless communication system. However, the current WINNER II GCM model is only built in the two-dimensional plane. In order to describe the actual MIMO channel characteristics more accurately, this paper constructs the WINNER II general channel model in three-dimensional space. The extended 3D WINNER channel model is simulated in terms of channel capacity. 4. The parameter calibration of the 3D channel model is simulated, and the statistical results of channel feature description are given.
【學位授予單位】:西安電子科技大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN919.3
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