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.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
关键词
OFDM
FFT
调制解调
orthogonal frequency division multiplexing
fast fourierTransformation
moddemod
