New modulation and demodulation algorithm in all-phase OFDM

Abstract:

To solve the problem of frequency spectrum, a method using all-phase FFT is presented in this pa- per. Based on the theory of all-phase FFT and OFDM, the mathematical expression, model and algorithm of modulation and demodulation in all-phase OFDM system were derived. The all-Phase FFT can adjudicate the phase and amplitude by using the function of spectrum analysis. The simulation results show that All-Phase OFDM system has less phase error, spectrum leakage and lower BER than OFDM