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It is concluded that MDV is determined by the clutter power spectrum spread and the rank of MTI filter, not by the pulse repetition frequency. 得出的结论是：MDV由杂波功率谱宽度和MTI滤波器阶数决定，与脉冲重复频率无关。
Differential frequency hopping (DFH) is a new kind of spectrum spread communication technique owing to the G function algorithm. 摘要差分跳频是一种新的扩展频谱通信技术，它主要归结于一种G函数算法。
Differential frequency hopping(DFH) is a new kind of spectrum spread communication technique owing to the G function algorithm. 差分跳频是一种新的扩展频谱通信技术,它主要归结于一种G函数算法。
The result shows that it is possible to increase the TSs and channels as per requirements in FTTR solution,because the optical signal beat noise is reduced by spectrum spreading of CDMA. 结果表明 ,由于 CDMA的扩频作用减少了光信号噪声 ,使得FTTR方案中按照需要增加终端站和信道数目成为可能
The result shows that it is possible to increase the TSs and channels as per requirements in FTTR solution,because the optical signal bea t noise is reduced by spectrum spreading of CDMA. 结果表明，由于CDMA的扩频作用减少了光信号噪声，使得FTTR方案中按照需要增加终端站和信道数目成为可能。
spectrum spreading code sequence 频谱扩展码序列
Direct Sequence Spectrum Spreading (DSSS) 直接序列扩频
Tamed Spread Spectrum Spread Spectrum System System 软扩频系统
What can we do to prevent the disease spreading? 我们能做什么来防止这种疾病蔓延呢？
The smoke from chimney is spreading out in the sky. 烟囱冒出的烟正在空中散开。
Moral taint has spread among young people. 道德的败坏在年轻人之间蔓延。
He spread the map flat out on the floor. 他把地图平铺在地上。
The survey covered a broad spectrum of topic. 这本简史涉及的话题范围很广。
It is John that/who is spreading the news. 传出消息的人乃是约翰。
A hopeless future seemed to spread out before her. 展现在她面前的似乎是毫无希望的前途。
He has spread a slice of bread with Jam. 他把面包片抹上了果酱。
He spread the news around the town. 他在镇上到处传播这一消息。
The news soon spread to the farthest corner. 消息很快传到最远的角落。
Fear spread through the crowd like a contagion. 人们心中的恐惧像瘟疫一样蔓延开来。
He aimed his gun at the eagle spreading its wings. 他的枪瞄准那只展开翅膀的老鹰。