Description: 3G里使用的Spreading技术演示仿真。用于教学演示的Matlab模型。A demo of spreading code generation and modulation used in 3G.-3G Lane Spreading the use of simulation technology demonstration. Teaching Demonstration for the Matlab model. A demo of spreading code generation and modulat ion used in 3G. Platform: |
Size: 7515 |
Author:meng |
Hits:
Description: This model simulates a CDMA2000 1xRTT Forward link (between Base Station and Mobile Station). In particular, it simulates the Radio Configuration 3 of a Forward Fundamental channel. The block CDMA2k: Initial settings allows you to set different parameters such as data rate, Power Control SubChannel insertion rate, spreading code index, QOSF index and the channel model. Platform: |
Size: 105472 |
Author:张非 |
Hits:
Description: 改变不同的扩频增益以及正弦干扰时的误码率仿真-change the spreading gain sinusoidal interference and the BER simulation Platform: |
Size: 2048 |
Author:na |
Hits:
Description: 3G里使用的Spreading技术演示仿真。用于教学演示的Matlab模型。A demo of spreading code generation and modulation used in 3G.-3G Lane Spreading the use of simulation technology demonstration. Teaching Demonstration for the Matlab model. A demo of spreading code generation and modulat ion used in 3G. Platform: |
Size: 7168 |
Author:meng |
Hits:
Description: 关于扩频通信的一些基本模块，包括扩频的抗干扰，低检测概率等性能的仿真。-on spread spectrum communications, the basic modules, including the spreading of interference, the low probability of detection properties of the simulation. Platform: |
Size: 10240 |
Author:刘方 |
Hits:
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 |
Hits:
Description: it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed-it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed Platform: |
Size: 2048 |
Author:hassan |
Hits:
Description: (1) 产生数值为±1的用户随机数据；给出Matlab下对应的模块；
(2) 产生并给出64×64的Walsh矩阵，作为用户接入的扩频码；
(3) 利用上述一个用户的扩频码和用户数据演示扩频过程；给出Simulink工作框图；
(4) 利用FFT，计算并画出基带数据和扩频信号的频谱（在一个图中给出）；
-(1) value of ± 1 generated random data users given under the corresponding Matlab module (2) generation and gives the Walsh 64 × 64 matrix, as the user access to the spreading code (3) the use of the a user' s spreading code and spread spectrum user data presentation process given work Simulink block diagram (4) the use of FFT, calculate and draw the base-band spectrum data and the spread spectrum signal (given in a diagram) Platform: |
Size: 9216 |
Author:芊屹 |
Hits:
Description: 本文主要利用matlab编程工具对直接序列扩频通信的捕获过程进行仿真。仿真主要基于滑动相关法的有关理论,先讨论扩频仿真中起着重要作用的m序列的生成问题,尔后讨论调制信号的产生,然后在信号的捕获中分步讨论,先对捕获的流程进行简单的仿真,再依次加入噪声和多普勒频移后进行捕获仿真-In this paper, using matlab programming tools for direct sequence spread spectrum communication capture process simulation. Simulation of the sliding correlation method is based on the theory, first discuss the simulation plays an important role in spreading the m sequence generation problem, the modulation signal generation and later discussed, and the signal captured by stepping discussion processes the captured first simple simulation, and then followed by adding noise and Doppler frequency shift after the capture simulation Platform: |
Size: 132096 |
Author:sunnysnowhi |
Hits:
Description: CDMA Simulation Using MATLAB
This program models a simple implementation of CDMA technology. It considers multiple bit data streams sent by any number of senders across a common channel. Each sender uses a unique code word, given by the Walsh set, to encode its data, send it across the channel, and then perfectly reconstruct the data at the receiver.
The simulation utilizes these simplifications:
1. The individual data streams share the same bit length.
2. The code words are determined using the Walsh set to create orthogonal code words.
3. The spreading factor M of each code word is identical.
4. All users (data streams and codes) are synchronized in time.
5. Set-up and hold times of real-world systems are ignored.
6. The channel through which the data passes is ideal.-CDMA Simulation Using MATLAB
This program models a simple implementation of CDMA technology. It considers multiple bit data streams sent by any number of senders across a common channel. Each sender uses a unique code word, given by the Walsh set, to encode its data, send it across the channel, and then perfectly reconstruct the data at the receiver.
The simulation utilizes these simplifications:
1. The individual data streams share the same bit length.
2. The code words are determined using the Walsh set to create orthogonal code words.
3. The spreading factor M of each code word is identical.
4. All users (data streams and codes) are synchronized in time.
5. Set-up and hold times of real-world systems are ignored.
6. The channel through which the data passes is ideal.
Platform: |
Size: 1024 |
Author:maryam |
Hits:
Description: CDMA Simulation Using MATLAB
This program models a simple implementation of CDMA technology. It considers multiple bit data streams sent by any number of senders across a common channel. Each sender uses a unique code word, given by the Walsh set, to encode its data, send it across the channel, and then perfectly reconstruct the data at the receiver.
The simulation utilizes these simplifications:
1. The individual data streams share the same bit length.
2. The code words are determined using the Walsh set to create orthogonal code words.
3. The spreading factor M of each code word is identical.
4. All users (data streams and codes) are synchronized in time.
5. Set-up and hold times of real-world systems are ignored.
6. The channel through which the data passes is ideal.-CDMA Simulation Using MATLAB
This program models a simple implementation of CDMA technology. It considers multiple bit data streams sent by any number of senders across a common channel. Each sender uses a unique code word, given by the Walsh set, to encode its data, send it across the channel, and then perfectly reconstruct the data at the receiver.
The simulation utilizes these simplifications:
1. The individual data streams share the same bit length.
2. The code words are determined using the Walsh set to create orthogonal code words.
3. The spreading factor M of each code word is identical.
4. All users (data streams and codes) are synchronized in time.
5. Set-up and hold times of real-world systems are ignored.
6. The channel through which the data passes is ideal.
Platform: |
Size: 1024 |
Author:maryam |
Hits:
Description: 实现扩频里随机信号和伪码序列的产生，以及关于生成扩频序列的MATLAB程序，并用载波信号实现2PSK调制-Spread spectrum signal generated in the realization and pseudo random code sequence, and generate MATLAB program about spreading sequences and modulated carrier signal to achieve 2PSK Platform: |
Size: 1024 |
Author:陈燕 |
Hits:
Description: 实现扩频里随机信号和伪码序列的产生，以及关于生成扩频序列的MATLAB程序，并用载波信号实现2PSK调制,在接收端用非相干积分实现捕获以及虚警概率的计算-Spread spectrum signal generated in the realization and pseudo random code sequence, and generate MATLAB program about spreading sequences and achieve 2PSK modulated carrier signal used to calculate the receiving end with a non-coherent integration to achieve capture and probability of false alarm Platform: |
Size: 1024 |
Author:陈燕 |
Hits:
Description: 实现扩频里随机信号和伪码序列的产生，以及关于生成扩频序列的MATLAB程序，并用载波信号实现2PSK调制,在接收端用非相干差分积分实现捕获-Spread spectrum signal generated in the realization and pseudo random code sequence, and generate MATLAB program about spreading sequences and achieve 2PSK modulation carrier signal at the receiving end with the capture of non-coherent differential integrator Platform: |
Size: 1024 |
Author:陈燕 |
Hits:
Description:
The main aim of our project is to simulate CDMA modem using DS-SS (Direct sequence spread spectrum) in MATLAB. Spread spectrum is basically type of modulation that spreads data transmission across available frequency band, in excess of minimum bandwidth available. We will be generating code by multiplying with pseudo random code in order to generate spread spectrum, transmitting it over a common frequency band and de-spreading the signal using same pseudo random code at the receiver. Also our aim is to simulate the de-spreading of the received CDMA signal in the presence of AWGN .
-
The main aim of our project is to simulate CDMA modem using DS-SS (Direct sequence spread spectrum) in MATLAB. Spread spectrum is basically type of modulation that spreads data transmission across available frequency band, in excess of minimum bandwidth available. We will be generating code by multiplying with pseudo random code in order to generate spread spectrum, transmitting it over a common frequency band and de-spreading the signal using same pseudo random code at the receiver. Also our aim is to simulate the de-spreading of the received CDMA signal in the presence of AWGN .
Platform: |
Size: 1775616 |
Author:viks |
Hits:
Description: 这是一个研究在通信领域的扩频因子的变化，不同的扩频因子导致在最终的通信错误代码的性能不同！(This is a study of the spread factor variations in the communications domain, and different spreading factors lead to different performance in the final communication error code!) Platform: |
Size: 2048 |
Author:14024235
|
Hits:
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
|
Hits:
Description: Here's an example of a MATLAB script that simulates a basic CDMA (Code Division Multiple Access) system. This script assumes that the user has already generated spreading codes for each user, and that the codes are stored in a matrix called `spread_codes`, where each row represents a different user and each column represents a chip in the code. The script also assumes that the data to be transmitted is stored in a vector called `data`. Platform: |
Size: 105703 |
Author:mustafa1970 |
Hits:
Search - Spreading code in matlab