inverse fast fourier transform meaning in Chinese

快速傅里叶逆变换
快速傅立叶逆变换

The fields at any point , especially at the points in the middle field region , are reconstructed by using the theory of the plane wave and the inverse fast fourier transform in this thesis
论文根据平面波谱的展开理论和傅立叶反变换首次给出了在空间任意点，特别是中场区，的场分布。
Firstly , the discrete multi - tone processing in an adsl central office - side interface card is detailedly introduced . the processing mainly includes timing , framing , interleaving , forward error correction , cyclic redundancy check , constellation encoding , inverse fast fourier transform processing , prefixing , d / a converting , and amplifying . secondly , a kind of interface named utopia level 2 is used as the network interface , with which many adsl devices are linked with one atm layer
本文比较详细地阐述了数字用户线接入模块( dslam )开发方案中， adsl局端接口模块的dmt编码与调制过程，讨论了其组网应用方式以及基于atm的网络侧接口utopia2技术，分析了adsl与其它宽带接入技术的相互联系和优缺点，并介绍了方案中所采用的一些关键技术，包括在线插拔技术、系统同步启动和故障自动重起技术以及高速数字信号完整性的保证技术等等。