| 1. | Ifft 2006international furniture fair tokyo
日本国际家具展 |
| 2. | In the first part , researches the theory of ofdm , and how to realize ofdm system by fft / ifft
第一部分首先研究ofdm理论，以及如何用基于fft和ifft的技术实现ofdm系统。 |
| 3. | The design and implementation of transform - domain filter algorithm based on fft / ifft transform is discussed
阐述了基于fft / ifft变换的变换域滤波技术在fpga上的设计与实现。 |
| 4. | To solve the problem of higher range sidelobe of phase - coded radar , the method of removing big power signals with fft _ ifft is presented in this paper
针对相位编码雷达距离旁瓣较高的问题，本文提出了fft _ ifft法去除大功率信号来抑制距离旁瓣。 |
| 5. | The research results show that the influence of sampling frequency , sampling error of peak value , strobe - position and strobe - width on fft and ifft is obvious
研究发现，超声信号的采样频率、采样特征点、闸门位置及闸门宽度对超声信号的fft及ifft结果有明显的影响。 |
| 6. | The filter can satisfied different characteristics requirements by transferring four window functions , intercepting different filter archetypes . 2 realizing fft / ifft with time - drawing
此设计法实现的滤波器，可通过调用四种窗口函数，截取不同的滤波原型，以满足不同的性能要求。 |
| 7. | Each order rainbow can be separated and reconstructed from the interference intensity distribution , using low or band pass filtering for the interference spectrum of the intensity and ifft
提出了对干涉强度频谱进行低通和带通滤波、 ifft的方法，从干涉强度分布中分离重建各阶彩虹。 |
| 8. | Consequently , the author presents the basic principle of ofdm , and the process how to utilize the certain technology based on fft & ifft to realize the ofdm system
描述了802 . 11协议介质访问控制层和物理层的操作及帧结构。接着，作者论述了ofdm的基本原理，以及如何用基于fft和ifft的技术实现ofdm系统。 |
| 9. | Secondly , the methods to realize the shaping - filter are introduced , which include the fir algorithm , the fft - ifft algorithm and the symbol sliding - window algorithm . the genetic algorithm ( ga ) is used to optimize the filter coefficients
接着介绍了成形滤波器的几种实现方法，包括fir算法、 fft - ifft算法和码元滑动窗算法，并将遗传算法用于确定成形滤波器的系数。 |
| 10. | The main hardware - platform is based on the altra ’ s statix series fpga chip ep1s80f1020c5 . the realization of the energy dispersal , ldpc - coding , symbol interleaving , constellation mapping , synchro - pn insertion , 3780 - point ifft ofdm , interplation fir , etc have been implemented based on fpga
系统中能量扩散、 ldpc编码、符号交织、星座映射、同步pn头插入、 3780点ifftofdm调制以及信号成形4倍插值滚降滤波器等都是基于fpga硬件设计实现的。 |
