| 1. | Low losses and frequency selectivity at the same time
能，低消耗和同步的频率选择功能。 |
| 2. | Acent frequency selectivity
邻近频率选择性 |
| 3. | Much attention has been paid to it , because the system can achieve better performance than conventional cdma in high data applications and it is potentially robust to channel frequency selectivity
Cdma技术和ofdm技术结合产生了多载波cdma系统，它很好地解决了高速数据业务下传统cdma系统性能下降等一系列问题。 |
| 4. | Finally , this thesis put forward the application of frequency diversity reception to the counteraction against the frequency selectivity decline in the airborne oceanic submarine laser communication system , and whose capability graph is educed through the simulation on the computer
文中提出把频率分集接收技术应用于对潜通信中，以达到抗频率选择性衰落的目的，并通过计算机模拟得出了其性能曲线。 |
| 5. | Stfs is a good coding arithmetic which is simple and easy to realize . moreimportantly stfs has higher diversity order and encoding gain than sts at the samesymbol rate . it can repel channel fading , improve data rate and wireless systemcapacity availability , stand against frequency selectivity fading , eliminate theintersymbol interference
该编码算法不仅在方法和原理上简单,而且易于实现,在相同符号率下比空时扩频具有更大的分集度和更高的编码增益,能有效抵抗信道衰落、提高数据速率、提高无线系统容量、很好的对抗频率选择性衰落和消除符间干扰。 |
| 6. | The results indicate : ( 1 ) there are interactions between the neurons in iso - frequency laminas and hetero - frequency laminas , and the mutual inhibition is predominant ; ( 2 ) the mutual inhibition of the inferior collicular neurons can increase the frequency selectivity , and play an important role in modifying the discharge features of the neurons
上述结果表明： （ ）下丘神经元声信号处理过程中，位于同频层内及非同频层的神经元之间存在相互作用，该作用以相对抑制为主； （ 2 ） ic神经元之间的相互抑制作用可增强神经元的频率选择性，并对神经元的发放特征有重要的修饰作用。 |
| 7. | Be based upon the studies of sea optical scatter channel by use of monte carlo simulation , the channel is described as a multipath routeway in this paper . the effect on the communications performance , created by the frequency selectivity decline caused by the multipath routeway , is worked over . the correlation bandwith of sea optical scatter channel is analyzed and quantified through the simulation on the computer
基于对海水信道的蒙特卡罗模拟，本文对海水信道进行了多径化描述，研究了由于信道的多径化所产生的频率选择性衰落对通信质量的影响，分析并通过计算机模拟确定了海水信道的相关带宽。 |
