1) direct sequence
直接系列
2) direct sequence
直接序列
1.
Analysis of the simulation of direct sequence spread spectrum communication system;
直接序列扩频通信系统误码率的仿真分析
2.
The difference between UWB and the traditional direct sequence spread spectrum technology was analyzed,and the simulation models of TH-IR and DS-IR systems were installed.
首先分析了超宽带技术与传统的直接序列扩频技术的区别,然后建立了TH-IR和DS-IR超宽带系统的仿真模型,得到两种IR系统在多种干扰条件下的误码率性能。
3.
This paper demonstrates major performances and direction for use of all digital direct sequence spread spectrum STEL-2000A chip.
介绍了全数字式直接序列扩频芯片STEL2000A的主要性能和用法,并以STEL2000A芯片为核心,辅以A/D、D/A、智能控制器等若干外围器件,构成了一个适合野战环境的扩频收发系统实例,包括系统参数选择、硬件设计和软件设计3部分,硬件部分着重STEL2000A的接口设计,软件部分着重STEL2000A内部编程,最后给出了系统调试结果。
3) direct-sequence
直接序列
1.
To discuss properties of the direct-sequence spread-spectrum communication system resisting interference from other spread-spectrum signals.
取消待接收的直接序列扩频信号与其他直接序列扩频干扰信号码元宽度相等的限制来讨论直接序列扩频通信系统抗其他扩频信号干扰的性能。
2.
In this paper,we analyse influence of various interferences on a system-model of direct-sequence spread-spectrum receiver, calculate processing gain of the system and correct theoretical mistake in some books.
分析了各种型式的干扰对于直接序列扩频接收机模型这一系统的影响。
4) DS
直接序列
1.
The technique first splits conventional DSSS (Direct Sequence Spread Spectrum) signal into two lowerrate, narrowerbandwidth components, then these are transmitted by modulating orthogonal carriers, signals are recombined at receiver.
文中研究了一种无线电定位的新方法,该方法首先将直接序列的扩频信号分成两路低速的窄带信号,然后每路窄带信号再调制互相正交的载波发射,在接收端恢复出原来的高速直扩信号,再使用常规方法得到传输时延,测量出目标的距离。
2.
In this paper, First of all, The basic principle of Simulation Software of System View was given, then we made a point on the application of System View to teaching in the course of Spreading band communication, And one DS Spreading band system as an example was given, So we can actualize System View is very important for Spreading band communication Courses .
对System View仿真软件作了简要介绍,详细论述了其在扩频通信课程中的应用,并以直接序列扩频原理为例说明了该仿真软件的应用。
5) DSSS
直接序列扩频系统
1.
Simulation of DSSS System with Co-Channel Interference by MATLAB
直接序列扩频系统抗同频干扰的MATLAB仿真
2.
In order to suppress the existence of a large number of spread-spectrum communications interference,build a DSSS(Direct Sequence Spread Spectrum) model of linear frequency-modulated interference is built by the method of FRFT(Fractional Fourier Transform) which is on time domain.
为了抑制扩频通信中存在的大量干扰,构建了直接序列扩频系统抗线性调频干扰(Linear Frequency Modulation,LFM)模型,重点对基于分数阶傅立叶变换(Fractional Fou-rier Transform,FRFT)的时频滤波算法及其改进算法的性能作了仿真和分析。
6) diameter series
直径系列
1.
Research on determining diameter series of inch-dimensioned or non-standard miniature deep groop ball bearing;
英制及非标微型深沟球轴承直径系列探讨
补充资料：WFJ系列微分碎机 CWFJ系列超微粉碎机
制粒原理
该系列微粉碎机和超微粉碎机，由主机、辅机、电控三个部分组成，设计紧凑、结构合理，具有风选式、无筛无网。机内装有分机机构，能使粉碎，分机一次完成。负压输送使粉碎作业时机腔内产生的热量源源不断的排出，故也适应于热敏性物料的粉碎。本机适应范围广，生产过程连续进行，出料粒度可调：能处理如：化学制品、食品、药品、化妆品、燃料、树脂、壳物等多种物料的粉碎及分级。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条