Description: 压缩文件夹中包含二十几个ＭＡＴＬＡＢ编写的仿真程序，包括ＧＭＳＫ信号的调制仿真，ＰＮ码生成，ＦＩＲ滤波器的设计，ＧＯＬＤ序列的生成等等，另外还有许多经典的滤波器变换的小程序-compressed file folder containing 20 prepared by several MATLAB simulation program, including GMSK modulation signal simulation, PN code generation, FIR filter design, GOLD sequence generation, etc., in addition to many classic filter transform small program Platform: |
Size: 54490 |
Author:dxf |
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Description: 压缩文件夹中包含二十几个ＭＡＴＬＡＢ编写的仿真程序，包括ＧＭＳＫ信号的调制仿真，ＰＮ码生成，ＦＩＲ滤波器的设计，ＧＯＬＤ序列的生成等等，另外还有许多经典的滤波器变换的小程序-compressed file folder containing 20 prepared by several MATLAB simulation program, including GMSK modulation signal simulation, PN code generation, FIR filter design, GOLD sequence generation, etc., in addition to many classic filter transform small program Platform: |
Size: 54272 |
Author:dxf |
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Description: 使用matlab编写的PN序列函数，用来生成PN序列，里面有大量说明-use Matlab prepared by the PN sequence function, used to generate PN sequence, there are extensive notes Platform: |
Size: 1024 |
Author:霍炎 |
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Description: 直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。在接收端,原伪噪声序列和所收信号的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声；同时，将DS信号解扩,恢复原始信息数据。-direct sequence spread spectrum communication can be effective resistance from the channel narrowband interference. In a DSSS system. Spreading through the sequence of pseudo-noise (PN) to send the right message to data modulation to achieve. On the receiving end, the original pseudo-noise sequence and the received signal may be related Operational narrowband interference signal DS extended to the whole band, make tampering equivalent to a lesser extent than the flat spectrum of noise; Meanwhile, the DS signal disspreaded restore the original data. Platform: |
Size: 111616 |
Author:赵艳朝 |
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Description: 直接序列扩频Matlab程序
直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。在接收端,原伪噪声序列和所收信号的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声；同时，将DS信号解扩,恢复原始信息数据。-Matlab procedures for direct sequence spread spectrum direct sequence spread spectrum communications can effectively resist the narrow-band interference from the channel. In a DSSS communication systems, spread spectrum pseudo-noise sequence through (PN) for sending information data modulation is achieved. At the receiving end, the original pseudo-noise sequence and the received signal related to computing can be extended to narrow-band interference signal DS the whole band, so interference is equivalent to a lesser extent than the flat spectrum of noise At the same time, the DS signal despreading and restore original information data. Platform: |
Size: 1024 |
Author:周一 |
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Description: 产生PN序列码的源代码，里面有详细的注释！希望对有需要的朋友有用！-PN code sequence generated source code, which has detailed notes! Wish to have a friend in need useful! Platform: |
Size: 1024 |
Author:李新苗 |
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Description: OFDM系统中以PN序列作为循环前缀和传统梳状导频信道估计方法对比-OFDM system with PN sequence as a cyclic prefix and traditional comb pilot channel estimation methods Platform: |
Size: 8192 |
Author:王寿珍 |
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Description: 本程序可生成直接序列扩频中所需的PN伪码m序列和golden序列-This procedure can be generated in direct sequence spread spectrum PN code required PN sequence and golden sequence m Platform: |
Size: 1024 |
Author:huangyi |
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Description: 伪随机码或称PN码，是扩频通信中不可缺少的一种序列。扩频通信，简单的说来就是通过一组相关性很强的伪随机序列，使原有的信号按照伪随机序列的特性出现。从波形上看，原有信号完全淹没于随机的噪声中，达到隐藏信号和抗干扰的目的。接受方只要有相同的伪随机序列，就可以通过伪随机序列很强的相关性将信号还原出来。而m序列，是扩频系统中最长用的伪随机序列。下面的代码就是基于matlab的生成m序列的代码，通过改变初始多项式的值，就可以生成不同阶数的m序列。-Pseudo-random code or PN code, spread spectrum communication is indispensable to a sequence. Spread spectrum communication, a simple to say that the adoption of a group of highly related to pseudo-random sequence, so that the original signal in accordance with the characteristics of pseudo-random sequence there. From the wave point of view, the original signal completely submerged in the random noise to hide the purpose of signal and interference. As long as the recipient has the same pseudo-random sequence, the pseudo-random sequence can be a strong correlation to restore the signal out. And m sequence spread spectrum system is the longest of the pseudo-random sequence used. The following code is generated based on m sequences of matlab code, by changing the value of the initial polynomial, we can generate a different order of the m sequence. Platform: |
Size: 1024 |
Author:fortunewjh0217 |
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Description: In this thesis a signal level simulator in uplink is implemented according to the physical layer specification of the IMT-2000 WCDMA system. The analytical WCDMA system through the use of linear algebra techniques is shown. Channel model is built on the classical understanding of fading, Doppler spread, delay spread, and incorporate additional concepts such as direction of arrival and antenna array geometry. PN sequence properties and generation are studied. Spreading and scrambling techniques are present. RAKE receiver and multiuser detection are described, and spatial processing in smart antenna are reviewed. A simulation tool in Matlab is developed in this work. Platform: |
Size: 562176 |
Author:mansoor |
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Description: 在一段音频序列中，利用混沌序列嵌入图像水印-In an audio sequence, the use of chaotic sequences embedded in image watermarking Platform: |
Size: 88064 |
Author:秦越 |
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Description: 用于在MATLAB环境下生成混沌序列（含MATLAB下的源代码）-Generated in the MATLAB environment for the chaotic sequence (including the source code under MATLAB) Platform: |
Size: 5120 |
Author:bryn |
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Description: 本文算法是将24 位真彩图的亮度分量分块
DCT ,然后利用DCT 量化系数的奇偶特性嵌入8
位灰度水印图,并通过PN 序列加密来保证水印的
安全性。算法中,将灰度图像转换为二进制数据
流,置乱后扩频调制,隐藏在宿主DCT 系数量化值
中,提取时不需要宿主信号,实现水印信号的盲提
取。-This algorithm is 24-bit true color pictures of the luminance component of block DCT, quantization DCT coefficients and then use the parity properties of 8-bit grayscale watermark embedding map, and through the PN sequence of encryption to ensure the security of the watermark. Algorithm, the gray image into binary data stream, scrambling after the spread spectrum modulation, hidden in the host DCT coefficient quantization values, the extraction does not require the host signal, the blind watermark extraction. Platform: |
Size: 284672 |
Author:王秀梅 |
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Description: 介绍了m 序列和Gold 序列的原理、性能和构造方法，接着在MATLAB 中用M 语言编程实现它们的产生和分析。-Describes the m-sequence and Gold sequence of principle, performance and construction methods, and then using M language in MATLAB programming their generation and analysis. Platform: |
Size: 90112 |
Author:李嵩 |
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Description: 直接序列扩频Matlab程序
直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现 的。在接收端,原伪噪声序列和所收信号的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声；同时，将DS信号解扩, 恢复原始信息数据-Direct Sequence Spread Spectrum Matlab program direct sequence spread spectrum communication can effectively resist from narrowband interference channel. In a DSSS communication system, the spread spectrum is modulated by a pseudo-noise (PN) sequence on the information data transmitted to achieve. The receiving end, the correlation calculation of the original pseudo-noise sequence and the received signal may be narrowband interference extended to the entire frequency band of the DS signal, the interference is equivalent to the relatively flat lower spectral amplitude noise same time, the DS signal despreading, restore original information data Platform: |
Size: 8192 |
Author:莫远 |
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Description: 1.掌握PN序列的相关知识，掌握m序列的产生原理及其在matlab中的产生方法，对特定长度的m序列，分析其性质，及其用来构造其它序列的方法。2.研究伪随机序列在跳频通信中的应用方法。-1. Acquire the relevant knowledge PN sequence generated grasp the principle of m sequences and generation method in matlab, m sequence of a specific length, analyze its nature and its methods used to construct other sequences. 2. Research methods applied in pseudo-random sequence hopping communications. Platform: |
Size: 1024 |
Author:宋杭科 |
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Description: 基于PN序列的数字直放站中回波抵消matlab实现代码，信号源采用OFDM调制信号，并有详细的注释说明，可以供大家参考借鉴-Digital repeater stations based on PN sequence in echo offset matlab code, signal source using OFDM modulation signal, and a detailed annotation, can for your reference Platform: |
Size: 3072 |
Author:刘浩 |
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Description: 建立了直接序列扩频系统的matlab仿真模型，在信道中存在高斯白噪声和干扰的情况下，对系统的在不同扩频增益下的误码率性能进行了仿真及分析，分析了扩频码的自相关性、误码率、性噪比。(A matlab simulation model of the direct sequence spread spectrum system, the existence of Gauss white noise and interference in the channel under the condition of the system in different spreading gain the BER performance of the simulation and analysis, analysis of PN code autocorrelation, BER, SNR) Platform: |
Size: 2048 |
Author:影0856
|
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