本代码是基于OFDM系统的一种转换域估计算法，有整个OFDM系统及改进的信道估计算法仿真。包括LS,MMSE,LMMSE,DFT,及改进后的DCT算法。-The code is based on the OFDM system, the conversion of a domain estimation algorithm, the OFDM system and revamp the entire channel estimation algorithm for the simulation.

比较DFT和FFT算法的速度。快速傅里叶变换速度更快。-Comparison of DFT and FFT algorithm speed. Fast Fourier transform faster.