| 摘要 |
PURPOSE: A technique for simulatively analyzing performance of a smart antenna-adopted MC-CDMA system is provided to perform a simulation analysis for a performance of a system according to change in the number of users in a laboratory. CONSTITUTION: In an MC-CDMA(Multi-Carrier Code Division Multiple Access), a signal is spread in a frequency zone by using a given orthogonal code, and data is carried in different subcarriers and transmitted. Thus, it is not only strong in frequency selective fading but also enhance a symbol transmission rate while restraining inter-symbol interference phenomenon by using an FFT(Fast Fourier Transform) and a serial/parallel exchange. This simulation technique assumes a system in which Hadamard Walsh code having excellent auto-correlation characteristics of a spread code in a synchronization channel is used in case of a DS-CDMA(Direct Sequence Code Division Multiple Access) and an optimum orthogonal code is used in case of the MC-CDMA. |
