基于FFT实现的OFDM信道调制解调的仿真与研究  

The Phantom and Research of OFDM Channel Moddemod Based on FFT

作　　者：廖日坤[1] 庄蔚然[2] 张立民[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071 [2]北京邮电大学电信工程学院,北京100876

出　　处：《南开大学学报（自然科学版）》2007年第6期91-94,99,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：教育部科学技术研究重大资助项目基金(0215)

摘　　要：OFDM 在时域和频域的交积重叠,每个子信道码流以很低的速度进行并行发送,有助于抗多径干扰,抗选择性衰落.OFDM 系统的信道调制解调部分用快速傅里叶变换(FFT)实现,具有良好的性能.OFDM can be used as a high--speed transmission technique to resist the waveform interference between signals, it＇s becoming a important technique in such fields like Mobile Communication and Wireless Communication. OFDM is intersecting and overlapping in the time domain and frequency domain, then every it＇s subchannel coded stream is concurrent transmitted with a very low speed, thus OFDM is beneficial to resist the multipathway interference and selective interference. The part of channel modulation and demodulation in OFDM system can be realized by Fast Fourier Transformation, and have a good performance in this way.

关 键 词：OFDM FFT 调制解调 

分 类 号：TN911.3[电子电信—通信与信息系统]