comb structure

The frequency band gaps of one-dimensional comb-like waveguide photonic crystals were investigated.

一维类梳状波导是由在一维主链上周期性接枝而形成的光子晶体 。

Two magnetic triphase catalysts of comb-like polyethers supported by γ-Fe2O3 were synthesized, and their catalytic behaviors in the iodo-substitution, etherization and the addition reaction of dichlo-rocarbene to styrene were also investigated.

以表面经偶联剂修饰的γ-Fe2O3为载体,通过聚[β-氯乙基缩水甘油醚]分别与乙二醇单甲醚和一缩二乙二醇单甲醚的醇钠盐反应,合成了两种磁性梳状聚醚三相相转移催化剂,研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

Two triphase catalysts of comb-like polyethers supported by silicas were synthesized,and their catalytic behavior in the iodo-substitution,etherization and the addition reaction of dichlorocarbene to styrene were also studied.

以表面经偶联剂修饰的二氧化硅为载体 ,通过聚 (β-氯乙基缩水甘油醚 )和醇钠反应 ,合成了两种梳状聚醚三相转移催化剂 ,研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

To the problem of interference and base-line excursion, this paper proposes an adaptive comb filter with Phase-Locked Loop(PLL), besides digital comb filters.

此外,针对医疗仪器中的残余调制工频干扰和基线漂移,除了使用数字梳状滤波器之外,还创新地提出一种有效的滤波算法——带锁相环的自适应梳状滤波器。

Based on principals of interference of acoustic waves and simplified digital delay-line,comb filter effect induced by superposition of reflections from steps is presented.

从声波干涉的基本原理出发,通过数字延时线的简化分析,说明了多级台阶反射声的叠加对声波频率产生的梳状滤波效果。

The transfer matrix method is used to study optical comb filter properties of one-dimensional multilayer photonic crystal.

把传输矩阵方法推广应用于研究一维多元光子晶体实现光学梳状滤波。

The PAPR problem in OFDM systems with comb-type pilots and its solution;

OFDM系统梳状导频的PAPR问题及解决方案

Both block-type pilot pattern and comb-type pilot pattern are studied and the performance of channel estimation algorithms based on above two pilots is compared in different channel scenarios,and then the simulation results show that block-type pilot is not sensitive to frequency selective fading channel but to the fading speed of channel while comb-type pilot is reversed.

分析OFDM系统中基于导频的信道估计技术,重点研究块状导频和梳状导频的设置模式和在2种导频模式下信道估计的算法。

The channel estimation methods for OFDM systems based on comb-type pilot sub-carrier arrangement are investigated,and a new method for estimating channel transfer function is proposed to estimate the channel transfer function from time and space.

研究了OFDM系统中基于梳状导频的空时信道估计方法,并提出了一种新的信道估计算法,即实现了空时二维信道估计。