Stochastic Analysis of In-Building Diffraction Loss with Multiple Antenna Topology

• Main Authors: We-Tin Liu, 劉韋廷
• Other Authors: John F. An
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/50144115487511329456

碩士 === 國立臺灣海洋大學 === 通訊與導航工程系 === 95 === The objective of this study is to investigate the property of diffraction wave due to the wave propagation the edge of the wall within a building. The measurement topology was assigned a multiple-input and single-output (MISO) using a 5-element uniform linear array (ULA) transmitter antenna system and a single received antenna, where a 6m of a spatial distance was taken for a dynamic measurements. The MISO channel matrices were derived by using the product of the symmetrical correlation matrices at the BS and MS. The dynamic measurement are composed of the line-of-sight (LOS) and non-line-of-sight (NLOS) respectively due to the construction of building, which leads to the shadow fading caused by the obstacles of the circumstance; therefore the diffraction loss of wave propagation was calculated by using Knife edge diffraction effect in a building. From the data analysis, it is not necessarily true that the MMEVR with large value when antenna spacing with small value for both LOS and NLOS environments when diffraction components tends to the significant. The CDF of diffraction wave from our experiments show that log-normal distribution is the best fitting, and it turns out that the smaller antenna spacing and the smaller standard deviation.