| 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 |
| 关键词: OFDM 全相位OFDM 调制 解调 频率偏移 |
| DOI：10.11918/j.issn.0367-6234.2012.05.019 |
| 分类号:TN929.5 |
| 基金项目: |
|
| New modulation and demodulation algorithm in all-phase OFDM |
|
Zhang Liong1,2
|
|
1.School of Electronic Information Engineering, Tianjin University, 300072 Tianjin, China;2.Tianjin Key Laboratory of Aclvanced Electrical Engineering and Energy, Tianjin Polytechnic University, 300387 Tianjin, China
|
| 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 |
| Key words: OFDM all-phase OFDM modulation demodulation frequency spectrums |
