Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TE2
Session:
Number:3TE2-3
Fast FDTD Analysis Using OFDM Pulse for Multi-Antenna Systems
Mitsuharu Obara, Naoki Honma,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Recently, Multiple-Input Multiple-Output (MIMO) systems [1] attract much attention and the MIMO systems are used widely in many areas of the wireless communication. The MIMO systems can improve the transmission rate without expanding frequency band. In MIMO systems, the transmission performance is greatly affected by the antennas and propagation characteristics. Therefore, it is important that the antennas and propagation characteristics are taken into account in the simulation of the wireless communication. Finite-Difference Time-Domain (FDTD) method [2] is convenient to analyze complicated structures including the antennas and propagation environments. However, computation time seriously increases in proportion to the number of antennas, since each antenna requires individual simulation. In this paper we propose a fast FDTD analysis method using simultaneous excitation for multiantenna systems. In this method, Orthogonal Frequency Division Multiplexing (OFDM) pulse and CI (Carrier Interferometry) [3] method is employed for maintaining the orthogonality among excited signals. The characteristics of the neighbouring antennas can be calculated by assigning different OFDM subcarriers exclusively. The CI enables the simultaneous verification of the antennas distant enough by controlling the length of the pulse. These methods can achieve fast analysis compared with the FDTD method with the conventional pulse. First, we describe the concept of pulse generation and analysis method. Next, the numerical analysis results are shown, and the effectiveness of the proposed method is clarified.