用matlab仿真实现了25 kHz 带宽内同时传送总共48 kbit/s 的两路语音(每路速率9. 6 kbit/s) 和两路数据信息(速率分别为19. 2 kbit/s 和9. 6 kbit/s) , 仿真结果表明达到了较好的误码性能。并比较了4 种数字调制方式下O FDM 系统的误码性能。-using Matlab Simulation bandwidth of 25 kHz simultaneous transmission within a total of 48 kbit / s

利用有限差分法 (Finite Differential Method, FDM)将场域离散为许多小网格，应用差分原理，将求解连续函数的泊松方程问题转换为求解网格节点上的差分方程组的问题。-The use of finite difference method (Finite Differential Method, FDM) will field for many small discrete grid, the application of differential principle, t

Orthogonal frequency division multiplexing (OFDM) is a communications technique that divides a communications channel into a number of equally spaced frequency bands. A subcarrier carrying a portion of the user information is transmitted in each band

采用G-S 线迭代方法，用于计算第一类边界条件下的二维温度分布。(FDM applied to the calculation of temperature field.2D)