direct sequencing造句

• This paper studies adaptive interference suppression technique for ss systems , especially for direct sequence ss ( ds - ss ) systems , emphasizing frequency domain adaptive algorithms and their implementation
  本文重点讨论了频域批处理lms自适应滤波算法，定量分析了算法的各项性能及其改进，并给出了计算机仿真结果。
• The computer simulation realized direct sequence spread spectrum system which used chaotic spreading sequences instead of pn codes and proved the applicability of using chaotic sequences as spreading codes
  最后用计算机模拟实现了用混沌扩频序列取代伪随机码的直接序列扩频通信系统，说明了混沌扩频序列可作为扩频码使用。
• A remote record system is designed using integrated circuit based on direct sequence spread spectrum carrier communication technology and can transfer data from the sender to the receiver via low voltage power line
  本文应用扩频芯片设计了一种远程抄表系统，它采用直接序列扩展频谱通信技术，以低压电力线作为媒介进行通信。
• The third generation mobile communication system has been the focal point of research in communication field , with its key technology - dsss / cdma ( directing sequence spread spectrum / coded division multiple access )
  以直接序列扩频码分多址( dsss cdma )为主流技术的第三代移动通信系统的研究和开发已成为通信领域的热点。
• For communication signals , we detect if there exist spread spectrum signals such as direct sequence spread spectrum ( dsss ) or frequency - hopped ( fh ) signals and estimate their parameters if the dsss or fh signals exist
  其次，对通信信号，检测是否有扩频信号存在并估计扩频参数；如果是非扩频的一般调制信号，则识别其调制模式。
• With the development of the modern electronic counterwork techniques , the estimate of the carrier frequency , signal period , and even the pseudo - random ( pn ) sequence itself of direct sequence spread spectrum ( dsss ) is possible
  随着现代电子对抗技术的发展使得估计直接序列扩频通信的载波频率、符号周期甚至扩频码本身变为可能。
• In direct sequence / code division multiple access ( ds / cdma ) communication system , different users employ distinct spreading codes but transmit at the same time and frequency
  在直接序列扩频码分多址( ds / cdma : directsequence / codedivisionmultipleaccess )通信系统中，不同用户指定不同的扩频码波形，不同用户的信号在同一频带内同时传输。
• The paper firstly analyses the fundamental principles of the direct sequence spread spectrum technique , the arithmetic in the frequency - domain by using the technology of the spectrum correlation adaptive filter
  本文首先就设计中选择采用的直接序列扩频技术、以及在频域中实现直序扩频信号中多窄带干扰抑制的自适应算法的基本原理做了分析。
• In modern communication , direct sequence spread spectrum communications was widely used in the fields of telemetering and telecontrol systems , because of low interception probability , its high noise resistance and good security
  在现代通信中,直接序列扩频通信技术以其截获概率低、抗干扰性强、保密性高等优点,在航天测控领域得到了广泛的应用。
• In addition , the results of dna direct sequencing reveal that 1 out of 18 rifampin - resistant isolates has deletion in codons 513 and 514 of rpob , and the other 17 are all singe - point mutation in their rpob genes
  此外， dna直接测序结果显示， 18株耐利福平菌株中，一株rpob基因的513 、 514位密码子发生了缺失，其它17株的rpob基因皆发生了单碱基突变。
• In the text , direct sequence spread spectrum signal ( dsss signal ) is the main object , and some nonlinear methods based on chaotic theory , used in the prediction of signal and detection of signal is studied
  本文以保密通信中广泛使用的直接序列扩展频谱信号( dsss信号)为主要对象,研究了一些基于混沌理论的非线性的方法在信号预测和信号检测中的应用。
• In chapter 4 and 5 , a phy communications processor based on direct sequence spread spectrum ( dsss ) , that is , the t / r signal processor part in a network card , is designed and realized , which is basically compromise the ieee802 . 11 standard
  本文第四章和第五章研究设计实现了无线网卡的物理层扩频通信机，即收发信机部分，它基本符合ieee802 . 11标准。
• Direct sequence spread spectrum ( dsss ) communication systems have the characteristics of wide spectrum , low working signal - to - noise ratio ( snr ) , anti - interference , anti - multipath effect , capability of cdma , lpi and lpd
  直接序列扩频(英文简称dsss )通信具有频谱宽、工作信噪比低、抗干扰和抗多径效应能力强、可实现码分多址、低截获和低检测概率等特点。
• The direct sequence spread spectrum ( dsss ) signal has been widely used , owing to the ability of lower working signal - to - noise ratio ( snr ) , strong anti - jamming , lower probability interception and mitigating the effects of multi - path fading
  直接序列扩频( dsss )信号由于具有工作信噪比低、强抗干扰性、低截获率、能够抑制多径效应等优点,已经得到广泛应用。
• Then studies a peculiar multi - carrier direct sequence spread spectrum ( mc - ds - cdma ) technology , analyzes the methods of processing multi - carrier signals and study the mathematical module of multi - carrier communication system receiver
  然后对本文所研究的这种特殊的多载波直接序列扩频技术进行阐述，分析了多载波信号处理的方法和研究了多载波接收机的数学模型。
• Chapter two demonstrates the performances of spread spectrum technique systematically . then the working principle of direct sequence spread spectrum ( dsss ) model is introduced , and the interference immunity properties are particularly discussed
  第二章对扩频通信技术的性能进行了系统分析，介绍了直接序列扩频方式通信系统模型的工作原理，详细论述了该系统的抗干扰性能。
• Based on the experience in building wlan in a mountain area county , the author analyses the direct sequence spread spectrum in wlan transmission technique , the composition of wlan and their applications , as well as the standard of wlan
  本文基于在一个山区县建成无线局域网的实践，研究无线局域网传输技术当中的直接序列扩频、无线局域网系统的组成和各种应用，并介绍无线局域网的标准。
• The spread spectrum communication ’ s availably jamming becomes the key to get the electronic war ’ s victory , so it is very important to research the effectiveness of jamming and interference referred to the direct sequence spread spectrum ( ds - ss ) communication system
  为取得现代电子战的胜利,对扩频通信的有效干扰成为关键。因此,研究直接序列扩频通信干扰效能具有重要的现实意义。
• Finally , it studies the way of organizing nets for direct sequence spread spectrum communication and brings forward the method of measuring parameters . it analyzes the status of applying direct sequence spread spectrum communication in daqing automatic reading meter system
  最后，研究了直扩通信的组网方式，提出了系统参数和测试方法，分析了直扩通信技术在大庆自动抄表系统中的应用状况。
• Direct sequence - code division multiple access ( ds - cdma ) communication systems are interference - limited systems . a cdma system employing conventional detect techniques will be degraded in performance and limited in capacity because of multiple access interference ( mai ) and near - far effects
  Ds - cdma通信系统是一个干扰受限系统，传统的检测技术由于多址干扰和“远?近”效应的影响使系统的性能和容量明显下降。