全相位OFDM系统的调制解调新算法

New modulation and demodulation algorithm in all-phase OFDM

摘要:

为解决OFDM系统中的频偏问题，利用全相位FFT技术，在全相位FFT和OFDM理论基础上，推导 出全相位OFDM调制解调的数学表达式，建立了全相位OFDM调制解调系统模型和算法．全相位FFT利用 自身的频谱分析功能来实现对信号相位和振幅的判决．实验结果表明：由频偏引起的相位误差和泄漏明显减 小，系统误码率显著降低，验证出全相位OFDM的性能要好于现有的OFDM系统

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