No abstract

In this letter, we present a new method that combines the spectrum spreading technique and FDTD (Finite-Difference Time-Domain) simulation for reducing the computation time in multipleantenna analysis. In this method, signals for the multiple antennas are generated by multiplying non-identical spreading codes, and multiple antennas are excited at the same time. This approach means that only a single FDTD simulation is needed whereas the conventional method needs as many simulations as there are transmitting antennas. A 2×2 multiple-antenna is simulated by way of a demonstration and it is found that the results of the proposed method agree well with those of the conventional method even though its computation time is shorter than that of the conventional method.

This paper proposes a new method that combines signal modulation and FDTD (Finite-Difference Time-Domain) simulations to reduce the computation time in multiple-antenna analysis. In this method, signals are modulated so as to maintain orthogonality among the excited signals; multiple antennas are excited at the same time. This means just one FDTD simulation is needed whereas the conventional method demands as many simulations as there are transmitting antennas. The simulation of a 2×2 multi-antenna system shows that the proposed method matches the performance of the conventional method even though its computation time is much shorter.