Description: 仿真实验原理部分cdma2000介绍
CDMA基本概念
扩频
编码
调制
信道
功率控制
同步和切换及接入-The principle part of cdma2000 simulation introduced the basic concept of CDMA spread-spectrum code modulation channel power control synchronization and switching and access Platform: |
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Author:子羽 |
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Description: 用matlab程序模拟实现cdma系统的整个过程。包括并串、串并转换，m序列的产生，直接扩频、解扩，qpsk的调制解调，载波调制解调等。-Matlab simulation procedures used to achieve the whole process of cdma systems. Including and string SERDES, m sequence generation, direct spread spectrum, despreading, qpsk the modulation and demodulation, carrier modulation and demodulation, etc.. Platform: |
Size: 8192 |
Author:朱丽平 |
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Description: 程序仿真了关于扩频系统在两种信道下的误码率-Process simulation of the spread spectrum system in about two channel BER Platform: |
Size: 4096 |
Author:tome |
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Description: ，用MATLAB实现快跳频通信系统的仿真。主要应用了SIMULINK和COMMUNICATION BLOCKETS两个模块。整个设计包括了信源产生部分、发送部分、跳频调制部分、信道部分、接收部分和结果分析部分共六个模块，核心技术是伪随机序列的产生和频率合成器的设计，而关键技术是收发两端的伪随机码元的同步。伪随机码的产生用S－函数编程来开发自己的SIMULINK模块。同步的实现是收发两端采用相同的扩频脉冲触发。而且在设计中每个模块都采用了模块封装技术，从而简化了框图结构-Using MATLAB to achieve fast frequency-hopping communication system simulation. The main use of SIMULINK and COMMUNICATION BLOCKETS two modules. The whole design, including part of the generated source, sending part of some frequency-hopping modulation, channel of the receiving part and the results of analysis of part of a total of six modules, the core technology is the emergence of pseudo-random sequence and frequency synthesizer design, and the key technology is the transceivers at both ends of the pseudo-random synchronization symbol. Pseudo-random code generated by S-function programming to develop their own modules SIMULINK. Synchronization is used to send and receive ends of the same spread-spectrum pulse trigger. But also in the design of each module using the module packaging technology, which simplifies the structure of the diagram Platform: |
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Author:笑笑生 |
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Description: 一个基本利用simulink实现的扩频通信系统，包含扩频、调制、解扩、解调，可以比较全面的了解扩频系统的组成。-Simulink realization of a basic use of spread-spectrum communication systems, including spread spectrum, modulation, despreading, demodulation, can be a more comprehensive understanding of the composition of spread-spectrum systems. Platform: |
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Author:ll |
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Description: cdma是在数字技术的分支——扩频通信技术上发展起来的一种崭新而成熟的无线通信技术。即将需传送的具有一定信号带宽信息数据，用一个带宽远大于信号带宽的高速伪随机码进行调制，使原数据信号的带宽被扩展，再经载波调制并发送出去。接收端使用完全相同的伪随机码，与接收的带宽信号作相关处理，把宽带信号换成原信息数据的窄带信号即解扩，以实现信息通信。-cdma wireless communication technology in a new and sophisticated digital technology branch- spread-spectrum communication technology developed. The data will be transmitted with a certain signal bandwidth information, bandwidth of the signal with a bandwidth much larger than the high-speed pseudo-random code is modulated, so that the bandwidth of the original data signal to be extended, and then via the carrier modulation and sent. Receiver use exactly the same pseudo-random code, for a correlation processing with the received bandwidth signal, the wideband signal is replaced with the original information data on narrowband signal despreading, in order to achieve information communication. Platform: |
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Author:jingjing |
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Description: MSK调制和直接序列扩频的结合，simulink仿真模块，对学习扩频通信有很大帮助，内有详细参数设置-MSK modulation and a combination of direct sequence spread spectrum, simulink simulation module, the learning spread spectrum communication helps a lot, with detailed parameter settings Platform: |
Size: 12288 |
Author:胡凯 |
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Description: cdma, direct sequence spread spectrum modulation. computes error rate of received sequence in a AWGN channel. simulated in simulink.-cdma, direct sequence spread spectrum modulation. computes error rate of received sequence in a AWGN channel. simulated in simulink. Platform: |
Size: 10240 |
Author:Harsha |
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Description: 一个我自己基于simulink的qpsk扩频调制，可以比较全面的了解qpsk的扩频调制系统的组成。-One of my own based on spread spectrum modulation qpsk simulink can qpsk more comprehensive understanding of the composition of the spread spectrum modulation system. Platform: |
Size: 8192 |
Author:侯瑞 |
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Description: 该程序是基于matlab/simulink下的扩频调制仿真通过采用PN码来调制信号，实现扩频调制-
The program is spread spectrum modulation simulation matlab/simulink based under PN code through the use of modulated signals, spread spectrum modulation Platform: |
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Author:chang |
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Description: matlab与simulink通信系统建模与仿真实例分析。
本書系統地介紹了通信建模仿真方法和模型驗證技術，並結合作者近年在教學科研中所設計的大量基礎的和較深入的建模仿真實例，詳細討論了Matlab/Simulink作為仿真實現平台在電子與通信工程中應用的基本方法、技巧和難點。本書重點討論了建模仿真原理和相關的數值計算方法、模擬通信系統、模數轉換、調製與編碼、信道模擬、載波與符號同步、信道均衡、跳頻系統和直接擴頻系統、通信模型正確性評估、仿真數據驗證和數據處理技術等內容，並在仿真實例中展示了科學研究論文和報告所必須的數據處理和表現技巧。 本書提供了約150個建模仿真實例，80多道思考題，以及全部實例代碼和一個電子教案。這些實例根據基本數學原理，結合Simulink的S函數編程，也使用了通信工具箱、信號處理工具箱和相關模型庫的模塊和函數，以便於讀者追源求本，深入理解建模和仿真的實質。 本書可作為高等院校通信工程、電子信息類專業的本科生和研究生系統仿真課程的教材或進行相關課題研究的參考書，也可作為相關專業課程設計和畢業設計等綜合性實踐教學的指導材料，還可供通信工程專業技術人員、教師等作為解決通信系統設計、評估和建模仿真領域實際問題的參考資料。-matlab and simulink communications system modeling and simulation case study. This book describes the methods and models of communication modeling and simulation verification technology, combined with the author in recent years in teaching and research in the design of a large number of basic and more in-depth modeling and simulation examples are discussed in detail Matlab/Simulink Simulation as an electronic platform the basic method of communicating with the project application, skills and difficulties. This book focuses on the modeling and simulation, and the related numerical methods, analog communication system, analog to digital conversion, modulation and coding, channel simulation, carrier and symbol synchronization, channel equalization, frequency hopping spread spectrum system and direct system, a communication model is correct content uation, simulation, data validation and data processing technology, and scientific research papers and reports show the necessary data process Platform: |
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Author:xinyan |
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Description: 在现代无线通信技术中，扩频通信是一种具有较强抗干扰性能的技术，正交频分复用(OFDM)是一种具有较高数据传输速率和频谱利用率，并能有效对抗频率选择性衰落的多载波调制技术，因而将这二者结合起来构建系统势必会进一步提高系统的抗干扰和抗衰落性能，研究其结合技术也逐渐成为无线通信领域的热点。随着3G的兴起，即将推出的LTE也将采用OFDM技术（正交频分多路复用）。
由于OFDM的多载波特性，使得直接序列扩频技术和跳频技术能够与OFDM技术进行有效的结合。在本文中,我们研究了OFDM）以及相关抗干扰抗衰落技术。同时用matlab进行了仿真，仿真结果表明，本文提出的ICI干扰消除技术在ofdm中起到了很好的效果。
-In modern wireless communication technologies, spread spectrum communication is a kind of strong anti-jamming technology, the performance of orthogonal frequency division multiplexing (OFDM) is a kind of high data rate and spectrum efficiency, and can be effective against frequency selective fading of multi-carrier modulation technology, and combine the two build system is bound to further improve the system s anti-interference and decay resistance, and study the combining technology also gradually become a hot spot in the field of wireless communications. With the development of 3 g, the upcoming LTE will also use OFDM (orthogonal frequency division multiplexing) technology.
Because OFDM multi-carrier characteristic, the direct sequence spread spectrum and frequency hopping technology can be combined with OFDM technology effectively. In this article, we studied the OFDM technology) and related anti-interference resistance to decline. Matlab simulation was carried out at the same tim Platform: |
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Author:wfyan |
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Description: 实现直扩系统的simulink仿真，采用BPSK调制，可以直观理解直接序列扩频通信系统的工作原理(The realization of direct sequence spread spectrum communication system can be understood intuitively by the realization of Simulink simulation of DSSS and BPSK modulation.) Platform: |
Size: 41984 |
Author:孙跳跳
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Description: This is the main code and simulation of the direct spectrum (DS) communication system that used the Walsh code to spread the signal through a large spectrum. The main modulation scheme in this code is the bpsk and you can easily get input and output diagrams through the programs in the simulink folder. Platform: |
Size: 111627 |
Author:mostafapour1 |
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Search - simulink of spread spectrum modulation