全相位FFT（apFFT）时移相位差法多频测试程序，内置5种不同的频率，可以得到很精确的幅值、频率、相位估计，仿真时精度很高。-All phase FFT (apFFT) method when multi-frequency phase-shift test procedures, built-in 5 different frequencies, can be very precise amplitude, frequency, phase estimation, the simulatio

C语言实现几种不同FFT的方法：其中包括时间抽取的基2 DFT，频率抽取的基2 DFT，分裂基算法、CZT方法等。-C language implementation of several different FFT approach: including the time taken by the base 2 DFT, frequency extraction base 2 DFT, split based algorithm, CZT methods.

包括广义互相关函数GCC时延估计，esprit算法对有干扰的信号频率进行估计,ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块。- Including the generalized cross-correlation function GCC time delay estimation, esprit algorithm signal frequency interference can be assessed ofdm system simulation including 1