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spread spectrum sequence
相关语句
  扩频序列
     Spread Spectrum Sequence Estimation for DSSS Signals
     DSSS信号的扩频序列估计
短句来源
     Parameter estimation for direct spread spectrum sequence signals
     直接扩频序列信号的参数估计
短句来源
     Design of Secure Communication System Based on Hyperchaotic Spread spectrum Sequence
     扩频序列超混沌保密通信系统设计研究
短句来源
     The paper proposes an effective algorithm to estimate the spread spectrum sequence of Direct Spread Spectrum Sequence (DSSS) signal, which is suitable for non-cooperative communication systems. Two measurement functions are suggested.
     提出了一个在非协作通信中对直接扩频序列(Direct Spread Spectrum Sequence,DSSS)信号的扩频序列进行估计的简单而有效的算法。
短句来源
     Acquisition of spread spectrum sequence based on characteristic of wavelet multiscale detection
     基于小波多尺度检测特性的扩频序列捕获研究
短句来源
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  扩频序列的
     The Study on the Chaotic Spread Spectrum Sequence and Its Application
     混沌扩频序列的研究与应用
短句来源
     Study on Spread Spectrum Sequence of CDMA Mobile Communication System
     码分多址移动通信系统中扩频序列的研究
短句来源
     This paper studies a kind of blind 2 D RAKE receiver,which combines the spread spectrum sequence structure with the spacial selectivity of the antenna array to implement RAKE filtering,and then combines the multipaths of the expected user in frequency domain.
     研究了一种盲 2 DRAKE接收机 ,该接收机结合扩频序列的时间结构特征与天线阵的空间选择性实现空域RAKE滤波 ,再对期望信号多径进行频域RAKE合并 .
短句来源
     At 1999, Lim Nguyen first brought forward a novel self-encoded spread spectrum(SESS) system, which spread spectrum sequence is full builded by the source data.
     自编码直扩通信是Lim Nguyen在1999年首次提出的一种利用信源数据产生扩频序列的随机直扩技术,它产生具有随机的、动态可变的扩频序列,因而是一种较好的安全通信方式。
短句来源
     Finally, we investigate the relationship between the determination of the output decision threshold of correlation,the probability of correlation peak detection and the error tolerance of the spread spectrum sequence.
     研究了相关器输出判决门限的确定及相关峰检测概率与扩频序列的容错能力之间的关系。
短句来源
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  “spread spectrum sequence”译为未确定词的双语例句
     2. The characteristics of pseudorandom spread spectrum sequence in the DSSS/BPSK signal exhibit the essential difference between the DSSS/BPSK signal and other conventional signals in communications.
     2.DSSS/BPSK信号中扩频伪随机序列的特征体现了DSSS/BPSK信号与其它常规通信信号最明显的区别。
短句来源
     By making use of the characteristics of pseudorandom spread spectrum sequence in time-domain, this thesis has studied the time-domain correlation detection method of the DSSS/BPSK signal and proposed the time-domain difference-accumulation detection method of the DSSS/BPSK signal.
     利用扩频伪随机序列在时域上的特点,本文研究了DSSS/BPSK信号的时域相关检测方法,并提出了DSSS/BPSK信号的时域累差检测方法。 在此基础上,通过对时域相关的小波分解,在有用信号频带未知造成前置滤波器无法设计时,提供了一种改善检测性能的可行性方案。
短句来源
     Despreading the array receiving signal with the spread spectrum sequence being orthogonal to user’s, and the coefficients of the channel FIR filter are then adjusted by CM algorithm adaptively to compensate the errors.
     在天线阵列附近,发射扩谱序列正交于用户信号的同频辅助信号,用辅助信号对阵列接收信号解扩,采用恒模算法自适应的调节阵列通道滤波器参数,达到补偿阵列误差的目的。
短句来源
     Chaotic sequence is considered as a good candidate for spread spectrum sequence in CDMA systems because it is characterized by good randomness, Kronecker Delta autocorrelation and orthogonal crosscorrelation.
     混沌序列在具有很好随机性的同时,一些序列还具有KroneckerDelta自相关和近似正交的互相关特点,因此被认为是实现直序扩谱CDMA系统较理想的扩谱序列之一,成为近年来研究的热点。
短句来源
     4. An chaotic FH wireless communication system is studied with the emphasis on a DDS-PLL hybrid frequency synthesizer design as well as a new spread spectrum sequence based on a second order discrete chaotic mapping.
     4. 研究了一个混沌跳频通信系统,重点是采用数字直接频率合成与锁相环技术相结合方式构成的跳频频率合成器开发,此外,建议了一种基于二阶混沌映射的扩频码,以代替过去报导过的Logistic混沌码。
短句来源
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  spread spectrum sequence
The approach taken is to hide the encrypted data in an artificially large file, using a key-driven spread-spectrum sequence.
      
The Costa's scheme and TTCQ codes were studied and exploited in order to generate this spread spectrum sequence.
      
It assigns each user a spread spectrum sequence as the fingerprint and the sequences among users are mutually orthogonal.
      


The capacity and bandwith efficiency of direct sequence spread spectrum (DS)sys-tem with Rake receiver are considered.A Rayleigh fading,discrete muitipth model is used.The focus of this paper is on the effect of spread spectrum sequence lengh,number of termsused for Rake and narrow band interference on the capacity and bandwith efficiency.

分析了Rayleigh多径衰落信道中,采用Rake接收的直接序列扩频(Rake-DS)系统的容量和频带利用率.着重讨论了扩频带宽、Rake分集数和窄带干扰对系统容量和频带利用率的影响.

the charactet of the coded CW signal is studied and the excellent properties Of Gold and Kasami sequenee families are distcussed in this paper.The block diagram of the digital signal processor is pre-sented when these two orthogonal spread spectrum sequence frmilies are employed in dispersed radar systems for air defense. The theoretical analyses results of simulation show that under the condition of larger Doppler frequency the processor shares excellent performances on pulse compression and spreading...

the charactet of the coded CW signal is studied and the excellent properties Of Gold and Kasami sequenee families are distcussed in this paper.The block diagram of the digital signal processor is pre-sented when these two orthogonal spread spectrum sequence frmilies are employed in dispersed radar systems for air defense. The theoretical analyses results of simulation show that under the condition of larger Doppler frequency the processor shares excellent performances on pulse compression and spreading Doppler tolerance.

研究了编码CW信号的特性,讨论了Gold序列族和Kasami序列族的优良的正交性,给出了这两种正交扩谱序列用于分布式防空雷达系统的数字信号处理机框图。理论分析和仿真结果表明:在多普勒频移较大时,这种处理机在脉冲压缩和扩展多普勒容限方面性能优越。

This paper analyses the relationship between sequence correlation and multiple access interference of code division multiple access communication system.The result shows that the periodic correlation and odd correlation of sequences are the key factor for multiple access interference and capacity.The composite sequences can be used to reduce the difficulty in design of spread spectrum sequences.

分析了序列的相关性与码分多址通信系统中多址干扰的关系,说明异步传输时,序列的非周期、奇相关性是影响多址和通信容量的主要因素,并提出采用复合序列降低扩频码设计中的困难

 
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