Description: 该程序仿真CDMA接收机的功能，包括解扩，解交织，信道编码(卷积码)，解码，信源编码(CRC)解码5个功能模块，生成用于数字基带传输的信号序列。
仿真CDMA发射机的功能，包括随机序列的产生，信源编码尾比特添加, 信道编码(卷积编码)，分组交织和扩频调制6个功能模块，生成用于数字基带，传输的信号序列，输出还包括用于解调所需要的信源编码尾比特值add_bits，交织器的尾比特值i_add_bits-CDMA receiver functions, including despreading, Xie intertwined, channel coding (convolutional codes), decoded, the source code (CRC) decoder five functional modules, production figures for the base band signal transmission sequence. Simulation CDMA transmitter functions, including random sequence generation, the source coding bit late add, Channel Coding (coding), a spread-spectrum modulation intertwined and six functional modules, production figures for the base-band, The transmission signal sequence, and the output is also included for the modems needed source coding bit value add_bits tail, interleaver value of the last bit i_add_bits Platform: |
Size: 3072 |
Author:刘洪 |
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Description: CDMA讲义，从伪码产生到扩频通信，非常详细，是中文的哦！-CDMA overhead from the pseudo-code generator to the spread spectrum communication is very detailed and Chinese Oh yes! Platform: |
Size: 866304 |
Author:小海 |
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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: |
Size: 772096 |
Author:子羽 |
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Description: 该程序是用MATLAB编写的应用于WCDMA中扩频的OVSF码的产生，简单实用。-The program is prepared to use MATLAB applies to WCDMA in the OVSF code spread-spectrum generation, simple and practical. Platform: |
Size: 17408 |
Author:严诚静 |
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Description: 实现CDMA系统的RAKE接收,比较最大比合并、等增益合并、、选择合并接收算法的性能，采用3条多径，每条多径之间延迟半个码片，信源输入采用16位WALSH码扩频-Realize RAKE receiver CDMA system to compare maximal-ratio combining, and so gain the merger, and select to receive the combined algorithm, using more than three tracks, each multi-path delay between the half-chip, input source code using 16 WALSH Spread Spectrum Platform: |
Size: 1024 |
Author: |
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Description: CDMA中的扩频码产生及自相关性和互相关性-CDMA spread spectrum in the generated code and self-relevance and cross-correlation of Platform: |
Size: 5120 |
Author:wumin |
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Description: 该程序可以实现直扩通信系统中扩频码的生成，可以通过键入本原多项式直接输出生成的扩频码，方便灵活。-The program can be achieved in DS spread spectrum communication system to generate code, you can direct the output type primitive polynomial generated spreading codes, convenient and flexible. Platform: |
Size: 12288 |
Author:qingyuanbao |
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Description: 直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码，与多用户信息数据相乘得到信息数据的直接扩频信号，再经过BPSK调制后发送出去，经过AWGN无线信道的传输后，在接收端与本地产生的地址码进行相关检测，从中将地址码与本地码一致的用户数据选出，把不一致的用户数据删除。-DS-CDMA DS-CDMA is the use of high-speed WALSH orthogonal code sequences as address code, with multi-user information data has been multiplied by the direct spread spectrum data information signal, and then after a BPSK modulated sent through AWGN channel after transmission, at the receiving end with the locally generated address code associated Detect, which will address code with local codes consistent user data elected to delete user data inconsistencies. Platform: |
Size: 5120 |
Author:huangshuangping |
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Description: Spread Spectrum and CDMA Principles and Applications 书籍和代码-Spread Spectrum and CDMA Principles and Applications book and code Platform: |
Size: 1581056 |
Author:wujianfeng |
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Description: 扩频通信系统及MATLAB仿真, 针对cdma的系统仿真完整的matlab源代码-Spread spectrum communication systems and MATLAB simulation, the system simulation for cdma complete source code matlab Platform: |
Size: 76800 |
Author:我 |
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Description: DS-CDMA通信系统仿真程序——包括扩频码的产生，发射机、接收机及性能分析等-DS-CDMA Communication System Simulation Program- including the spread spectrum code generation, transmitter, receiver and performance analysis Platform: |
Size: 10240 |
Author:ianua |
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Description: orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the spectrum is spread through the use of a user s code. User s codes are carefully chosen to be mutually orthogonal to each other.
These codes are derived from an OVSF code tree, and each user is given a different, unique code. An OVSF code tree is a complete binary tree that reflects the construction of Hadamard matrices. Platform: |
Size: 2048 |
Author:deep |
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Description: DS-CDMA直序扩频通信系统仿真源码，内部含有程序的详细中文解释以及word形势，系统大家下载~-DS-CDMA Direct Sequence Spread Spectrum Communication System Simulation source code, the internal procedures in detail with the Chinese to explain the situation and the word, the system you download ~ Platform: |
Size: 40960 |
Author:Yaphetzhen |
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Description: 码分多址(CDMA)技术作为第三代移动通信系统的核心技术，具有容量大、抗干扰能力强等优点。然而,传统的CDMA系统属于窄带扩频系统,它的数据速率比较低,不能胜任新一代移动通信系统
（beyond 3G）高速数据通信的需要。而多载波传输技术－正交频分复用（OFDM），作为后三代移动通信的核心技术，则具有高数据速率传输的特点。-Code Division Multiple Access (CDMA) technology as the third generation mobile communication system' s core technology, high capacity, anti-interference ability and so on. However, the traditional narrow-band CDMA system is spread spectrum system, and its relatively low data rate, can not do next-generation mobile communication systems (beyond 3G) high speed data communication needs. The multi-carrier transmission technology- orthogonal frequency division multiplexing (OFDM), after three generations of mobile communications as a core technology, the high data rate transmission characteristics. Platform: |
Size: 774144 |
Author:w |
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Description: 实验讨论的CDMA通信系统的仿真，采用的是直扩方式，信息没有经过调制，伪随机码采用的是63位GOLD序列.本课程的目的是熟悉CDMA通信系统的构架,了解m序列和gold码的软件实现, 以及用gold序列实现扩频和解扩,最后了解整个系统的误比特率与哪些因素有关。
-Experiments discussed in CDMA communication system simulation, using the DS method, the information has not been modulated, pseudo-random code is used in 63 GOLD sequence. The purpose of this course are familiar with CDMA communication system architecture, understand and gold code sequence m software implementation, and reconciliation with gold sequence spread spectrum to achieve expansion, and finally understand the whole system bit error rate with which factors. Platform: |
Size: 66560 |
Author:daming |
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Description: 这是关于直接序列扩频通信系统的DS-CDMA方式的仿真设计，系统主要分为发送机和接收机两部分，包括17个可用于SIMULINK仿真的S-FUNCTION代码M文件，和一个MATLAB源程序的DOC文件，程序都有详细的注释。-This is a direct sequence spread spectrum communication system on the DS-CDMA mode simulation design, the system can be divided into two parts, transmitter and receiver, including 17 for the S-FUNCTION SIMULINK simulation of M code files, and a MATLAB source code The DOC file, the program has detailed notes.
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Platform: |
Size: 26624 |
Author:masong |
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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: |
Size: 14336 |
Author:jingjing |
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Description: 编写了MATLAB程序生产和扩频码进行仿真，仿真程序从发送方完成通道的接收端，得出在不同的扩频码，在不同的信噪比即误码率的图形比较直接序列扩频通信系统原理，改善系统性能的度-Written MATLAB program to produce and direct sequence spread spectrum communication system principle of spreading codes for simulation, emulation program to complete the channel from the sender to the receiver end, draw graphics comparison at different spreading code, the bit error rate under different SNR i.e., the degree of improvement of the system performance Platform: |
Size: 6144 |
Author:吴晓 |
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Description: 简化的DS-CDMA通信系统仿真，数据流和时间流均可.码元速率256ksps，调制方式QPSK，扩频码为m序列或GOLD序列，信道为加性高斯信道和瑞利衰落信道两种，其他参数自己设定。-Simplified DS-CDMA communication system simulation, data flow and the flow of time can be. Symbol rate 256ksps, modulation QPSK, m-sequence spread-spectrum code sequence or GOLD, channel additive Gaussian channel and Rayleigh fading channels are two, other parameters set yourself. Platform: |
Size: 106496 |
Author:周挺挺 |
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