Description: 数字通信系统的设计及其性能和所传输的数字信号的统计特性有关。所谓 加扰技术，就是不增加多余度而扰乱信号，改变数字信号的统计特性，使其近 似于白噪声统计特性的一种技术。这种技术的基础是建立在反馈移位寄存器序 列（伪随机序列）理论之上的。解扰是加扰的逆过程，恢复原始的数字信号。 如果数字信号具有周期性，则信号频谱为离散的谱线，由于电路的非线 性，在多路通信系统中，这些谱线对相邻信道的信号造成串扰。而短周期信号 经过扰码器后，周期序列变长，谱线频率变低，产生的非线性分量落入相邻信
道之外，因此干扰减小。 在有些数字通信设备中，从码元“0”和“1”的交变点提取定时信息，若
传输的数字信号中经常出现长的“1”或“0”游程，将影响位同步的建立和保 持。而扰码器输出的周期序列有足够多的“0”、“1”交变点，能够保证同步 定时信号的提取。
-digital communication system design and performance and the transmission of digital signals on the statistical characteristics. The so-called scrambling technology is not to increase the degree to disrupt redundant signal, digital signal change the statistical properties it is similar to white noise statistical characteristics of a technology. This technology is based on feedback shift register sequences (pseudo-random sequence) of the above theory. Decryption is the reverse of the scrambling process, the restoration of the original digital signal. If the digital signal is cyclical, the signal spectrum of discrete lines, as the nonlinear circuit, in multi-channel communication system, these lines of the adjacent channel signal causing crosstalk. And the short-cycle signal after scrambling Platform: |
Size: 113625 |
Author:葛岭泉 |
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Description: 数字通信系统的设计及其性能和所传输的数字信号的统计特性有关。所谓 加扰技术，就是不增加多余度而扰乱信号，改变数字信号的统计特性，使其近 似于白噪声统计特性的一种技术。这种技术的基础是建立在反馈移位寄存器序 列（伪随机序列）理论之上的。解扰是加扰的逆过程，恢复原始的数字信号。 如果数字信号具有周期性，则信号频谱为离散的谱线，由于电路的非线 性，在多路通信系统中，这些谱线对相邻信道的信号造成串扰。而短周期信号 经过扰码器后，周期序列变长，谱线频率变低，产生的非线性分量落入相邻信
道之外，因此干扰减小。 在有些数字通信设备中，从码元“0”和“1”的交变点提取定时信息，若
传输的数字信号中经常出现长的“1”或“0”游程，将影响位同步的建立和保 持。而扰码器输出的周期序列有足够多的“0”、“1”交变点，能够保证同步 定时信号的提取。
-digital communication system design and performance and the transmission of digital signals on the statistical characteristics. The so-called scrambling technology is not to increase the degree to disrupt redundant signal, digital signal change the statistical properties it is similar to white noise statistical characteristics of a technology. This technology is based on feedback shift register sequences (pseudo-random sequence) of the above theory. Decryption is the reverse of the scrambling process, the restoration of the original digital signal. If the digital signal is cyclical, the signal spectrum of discrete lines, as the nonlinear circuit, in multi-channel communication system, these lines of the adjacent channel signal causing crosstalk. And the short-cycle signal after scrambling Platform: |
Size: 113664 |
Author:葛岭泉 |
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Description: matlab生成m序列的函数
原来那个效率太低，主要是因为实际应用并不需要生成太长的m序列，加入了需求长度，能有效减少运行时间。25级的移位寄存器，运行了一个小时都没有出来一周期，我仅仅需要三千bit而已。改进版：-matlab generate a function of the original m sequence that efficiency is too low, mainly because of the practical application does not require generation of long m sequences, joined the demand for length, can effectively reduce the running time. 25 of the shift register, run for an hour did not come out one cycle, I just need more than 3000 bit. Improved version: Platform: |
Size: 1024 |
Author:李强 |
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Description: 任意级移位寄存器的全部M序列的构成法，根据m序列的构造，给出了一个一般方法，用计算机产生任意级移位寄存器的全部非平移等价的M序列-Shift Registers arbitrary class of all M sequences constitute a law, according to the structure of m sequences, gives a general approach, using computer generated random-level shift register all the non-translation equivalent of M sequence Platform: |
Size: 583680 |
Author:李四 |
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Description: 该问题是线性移位寄存器的综合问题提出的，给定一个N长的
二元序列，如何求出产生这一序列的级数最小的线性移位寄存
器，即最短的线性移位寄存器 -The problem is that the linear shift register integrated question, given a N-long binary sequences, how to derive the sequence of series have the smallest linear shift register, that is the shortest linear shift register Platform: |
Size: 1024 |
Author:倪晨 |
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Description: this program performs pn sequence generation, with the provision to change shift register sequences Platform: |
Size: 1024 |
Author:gayatri_mirajkar |
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Description: 本实验利用单片机实现m序列的输出，其移位寄存器的长度为3 - 8可循环调节。单片机板上按键KEY1实现级数n的循环自加，按键KEY2实现级数n的循环自减，输出口P1^4输出m序列周期同步信号，输出口P1^6输出相应的m序列。-In this study, the use of single-chip microcomputer m sequence of output, the length of the shift register 3- 8 can be recycled adjustable. SCM series n-board keys KEY1 to achieve the cycle of self-plus, key KEY2 series n the cycle of self-realization by the output port P1 ^ 4 output m sequence cycle synchronization signals, the output port P1 ^ 6 output of the corresponding m-sequences. Platform: |
Size: 3072 |
Author:weiwei |
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Description: 用GAL16V8设计可变长度序列信号发生器，在掌握伪随机序列性质的基础上，设计给定长度的伪随机序列信号发生器，也即设计给定n后（n为移位寄存器的级数）最长线性反馈移位寄存器序列。并在给定n产生的最长序列的基础上，截短出课题给出的序列长度，并用FM软件对可编程器件GAL16V8进行编程，以实现长度不同的序列信号发生器。-GAL16V8 design variable-length sequence signal generator based on the master pseudo-random sequence nature, the design of a given length pseudo-random sequence
Signal generator, designed for the series) up to linear feedback shift register sequences given n (n is the shift register. And given n
Sequence length given by the subject on the basis of the longest sequence, truncated, and FM software for programming the programmable device GAL16V8, in order to achieve
Different length of the sequence signal generator. Platform: |
Size: 392192 |
Author:乔嘉麒 |
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Description: Pseudo Noise Sequences
A pseudo-noise (PN) sequence is a periodic
binary sequence ,usually generated by
means of feedback shift register
Platform: |
Size: 7168 |
Author:RRaji |
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Description: This the matlab code for linear feedback shift register (LFSR).LFSRs is used for generating pseudo-random numbers, pseudo-noise sequences, fast digital counters-This is the matlab code for linear feedback shift register (LFSR).LFSRs is used for generating pseudo-random numbers, pseudo-noise sequences, fast digital counters Platform: |
Size: 2048 |
Author:pooh |
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Description: 在掌握伪随机序列性质的基础上，设计给定长度的伪随机序列信号发生器，也即设计给定n后（n为移位寄存器的级数）最长线性反馈移位寄存器序列。并在给定n产生的最长序列的基础上，截短出课题给出的序列长度，并用FM软件对可编程器件GAL16V8进 行编程，以实现长度不同的序列信号发生器。-Grasp on the basis of the nature of a pseudo-random sequence, the design given the length of the pseudo-random sequence signal generator, i.e., designed to be fixed after n (n is the number of stages of the shift register) the longest linear feedback shift register sequences. And on the basis of the longest sequence given n generated, truncated topics given sequence length, and the FM software programmable device GAL16V8 programming, in order to achieve a different length sequence signal generator. Platform: |
Size: 6144 |
Author:LYY |
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Description: 理解线性移位寄存器序列密码算法的基本思想和一般步骤，C++实现序列密码。 掌握序列密码设计的核心密钥流生成器。通过该算法进一步理解对称密码算法。
-Understanding of linear shift register sequences of cryptographic algorithms basic ideas and general steps, C++ achieve stream ciphers. Grasp the core sequence key stream cipher design builder. By further understanding of the algorithm symmetric cryptographic algorithm. Platform: |
Size: 4088832 |
Author:陈烁 |
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Description: M序列生成的matlab程序，m序列是目前CDMA系统中采用的最基本的PN序列。 是最长线性反馈移位寄存器序列的简称-M sequence generation matlab program, m sequence is the most basic PN sequence CDMA systems currently used. Is the longest linear feedback shift register sequences referred to as Platform: |
Size: 1024 |
Author:abc |
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Description: 此模块的基本功能是将待调信号与 M序列的每一位进行异或，到达扩频的目的。其中设计了一个5级的移位寄存器用于产生M序列。-The basic function of this module is the signal to be modulated with the M sequence of each XOR reach spreading purposes. Which designed a five shift register used to generate M sequences. Platform: |
Size: 2048 |
Author: |
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Description: PN序列（Pseudo-noise Sequence）伪噪声序列.
这类序列具有类似随机噪声的一些统计特性，但和真正的随机信号不同，它可以重复产生和处理，故称作伪随机噪声序列。PN序列有多种，其中最基本常用的一种是最长线形反馈移位寄存器序列，也称作m序列，通常由反馈移位寄存器产生。-PNSeqGenerator,This class of sequences with some statistical properties similar to random noise, but the real random signal is different, it can repeat the generation and processing, the so-called fake random noise sequence. There are many kinds of PN sequences, among them, one of the most commonly used is the most linear feedback shift register sequence, which is also called as m sequence, which is usually generated by feedback shift register. Platform: |
Size: 1024 |
Author:liang |
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Description: 序列密码的安全保密性主要依赖于密钥序列，因此研究什么样的伪随机序列可以作为序列密码的密钥序列就成为序列密码研究中的主要问题，即序列密码的关键是产生密钥序列的算法。-Security and confidentiality of the password depends on the sequence of key sequence, the study of what can be used as a pseudo-random sequence key sequences password becomes a stream cipher research main issues, namely key sequence is generated password key sequence algorithm. Platform: |
Size: 312320 |
Author:胖熊 |
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